Necesidad de superación profesional para el diagnóstico de ancianos con trastornos de la marcha / Necessity of professional training for the diagnosis of elderly with gait disorders

El envejecimiento es un conjunto de modificaciones morfológicas y fisiológicas, que aparecen como consecuencia de la acción del tiempo sobre los seres vivos, e implican cambios en los sistemas orgánicos que influyen en el desplazamiento. Teniendo en cuenta las insuficiencias detectadas en la preparación de los especialistas en medicina general integral para efectuar el diagnóstico temprano de ancianos con trastornos de la marcha, surgió la necesidad de sistematizar los referentes teóricos que sustentan la superación de estos profesionales. En tal sentido, en el presente artículo se describen los cambios en los sistemas de órganos relacionados con la marcha, la clasificación clínica, las causas y las consecuencias, lo cual ayudará a solucionar esta problemática en la atención primaria de salud.

Aging is a group of morphological and physiologic modifications that appear as consequence of the time action on living beings, and imply changes in the organic systems that influence in movement. Taking into account the inadequacies detected in the preparation of comprehensive general medicine specialists to make the early diagnosis of elderly with gait disorders, it was necessary to systematize the theoretical referents that sustain the training of these professionals. In such a sense, changes in the systems of organs related to gait, clinical classification, causes and consequences are dsecribed in this work, which will help to solve this problem in primary health care.

The effect of dyskinesia on postural control, balance, gait, and fall risk in people with Parkinson's disease: a systematic review protocol

Dyskinesia affects the limbs, trunk, and head and is more prevalent in people with Parkinson's disease (PD) and a history of falls. More evidence about the effects of dyskinesia on postural control, balance, gait, and fall risk could help improve the quality of life of individuals with PD. This review aims to examine associations between dyskinesia and postural control, balance, gait, and fall risk in individuals with PD. Such information could lead to new approaches to quality of life improvement among individuals with PD. PubMed, CINAHL, PsycInfo, Scopus, and SciELO will be searched for longitudinal, cohort, and case-control studies published in English or Portuguese in any year that investigated the association between dyskinesia and postural control, balance, gait, and fall risk in individuals with PD. Two reviewers will independently evaluate the titles, abstracts, and full texts according to PRISMA guidelines to select eligible studies for the review. Data on participants, dyskinesia, postural control, balance, gait, and fall risk will be extracted and summarized in tables. Two reviewers will independently assess the methodological quality of each study using the Newcastle Ottawa quality assessment scale. Meta-analysis will not be performed. The results of this systematic review will offer insight into the effects of dyskinesia on postural control, balance, gait, and fall risk. Such information could significantly contribute to informed decisions about early motor intervention in individuals with PD. (AU)

Tratamiento de la contractura en flexión de rodilla en parálisis cerebral / Treatment for knee flexion contracture in cerebral palsy

La extensión completa de la rodilla es esencial para la marcha. Los pacientes con parálisis cerebral infantil con frecuencia pueden tener déficit de extensión de distinta magnitud, lo que compromete la marcha e incluso la bipedestación. El tratamiento de la contractura en flexión de rodilla parte por tratar la espasticidad de los músculos comprometidos y con fisioterapia. Cuando el flexo es estructurado, el tratamiento es quirúrgico mediante distintas técnicas, dependiendo de la magnitud de la contractura y de la edad del paciente. Las técnicas sobre partes blandas incluyen alargamientos funcionales de isquiotibiales y transferencias musculares. Cuando la contractura es capsular, es preferible realizar cirugía ósea, la cual extiende el fémur proximal, ya sea en forma progresiva, mediante fisiodesis anterior en pacientes pediátricos, o en forma aguda, mediante osteotomía extensora del fémur distal. Con frecuencia existe una patela alta, la cual hay que corregir en el mismo acto quirúrgico para mantener la eficiencia del aparato extensor

Full knee extension is essential for gait. Patients with cerebral palsy frequently have extension deficits of different magnitudes, which compromise walking and even standing up. The treatment of knee flexion contracture begins by addressing the spasticity of the involved muscles and includes physical therapy. For structured extension deficits, the treatment is surgical, using different techniques depending on the magnitude of the contracture and the patient's age. Soft tissue techniques include functional hamstring lengthening and muscle transfers. For capsular contracture, bone surgery is preferable and extends the proximal femur either progressively, through anterior physiodesis in pediatric patients, or acutely, by extensor distal femoral osteotomy. A high patella is common and requires correction during the same surgical procedure to maintain the efficiency of the extensor apparatus

Entrenamiento de la marcha con la cinta rodante antigravitatoria en pacientes con Parkinson / Gait training with the anti-gravity treadmill in Parkinson's patients / Treinamento de marcha com fita rolante antigravitatoria em pacientes com Parkinson

La enfermedad de Parkinson (EP) es una condición neurodegenerativa caracterizada por alteraciones motoras que afectan principalmente el desarrollo de la marcha, produciéndose generalmente el fenómeno del congelamiento de la marcha con la posibilidad del riesgo de caída. Objetivo: Analizar los beneficios del entrenamiento de la marcha con la cinta rodante antigravitatoria en pacientes con EP. Materiales y métodos: Es un estudio pre-experimental con un solo grupo de intervención. Se llevó a cabo el entrenamiento de la marcha a través de una cinta rodante antigravitatoria (AlterG) durante un mes dividido en 2 sesiones por semana. Los parámetros de la marcha arrojados por el equipo AlterG fueron la descarga de peso, cadencia, tiempo de apoyo y longitud del paso; además se valoró el congelamiento de la marcha con el cuestionario (FOGQ) y el riesgo de caída con el test Timed Up and Go (TUG). Resultados: En los parámetros de la marcha y en el FOGQ se encontró diferencias significativas (p<0,05) entre los valores de pre y post intervención, exceptuando a la variable cadencia. El riesgo de caída disminuyó 4,6 y 4,3 segundos promedio en el test TUG en hombres y mujeres respectivamente. Conclusión: El entrenamiento de la marcha en la cinta rodante antigravitatoria mejora las condiciones de la marcha y reduce el riesgo de caídas en pacientes con EP.

Parkinson's disease (PD) is a neurodegenerative condition characterized by motor alterations that mainly affect the development of gait, generally producing the phenomenon of freezing of gait with the possibility of risk of falling. Objective: To analyze the benefits of gait training with the antigravity treadmill in patients with PD. Materials and methods: It is a pre-experimental study with a single intervention group. Gait training was carried out using an antigravity treadmill (AlterG) for one month divided into 2 sessions per week. The gait parameters returned by the AlterG team were weight unloading, cadence, support time and step length; Furthermore, freezing of gait was assessed with the questionnaire (FOGQ) and the risk of falling with the Timed Up and Go test (TUG). Results: In the gait parameters and in the FOGQ, significant differences (p<0.05) were found between the pre- and post-intervention values, except for the cadence variable. The risk of falling decreased by 4.6 and 4.3 seconds on average in the TUG test in men and women respectively. Conclusion: Antigravity treadmill gait training improves walking conditions and reduces the risk of falls in PD patients.

A doença de Parkinson (DP) é uma condição neurodegenerativa caracterizada por alterações motoras que afetam principalmente o desenvolvimento da marcha, geralmente produzindo o fenômeno de congelamento da marcha com possibilidade de risco de queda. Objetivo: Analisar os benefícios do treino de marcha com esteira antigravitacional em pacientes com DP. Materiais e métodos: Trata-se de um estudo pré-experimental com um único grupo de intervenção. O treinamento de marcha foi realizado em esteira antigravitacional (AlterG) durante um mês dividido em 2 sessões semanais. Os parâmetros de marcha retornados pela equipe AlterG foram descarga de peso, cadência, tempo de apoio e comprimento do passo; Além disso, o congelamento da marcha foi avaliado com o questionário (FOGQ) e o risco de queda com o teste Timed Up and Go (TUG). Resultados: Nos parâmetros da marcha e no FOGQ foram encontradas diferenças significativas (p<0,05) entre os valores pré e pós-intervenção, exceto na variável cadência. O risco de queda diminuiu em média 4,6 e 4,3 segundos no teste TUG em homens e mulheres respectivamente. Conclusão: O treino de marcha em esteira antigravitacional melhora as condições de marcha e reduz o risco de quedas em pacientes com DP.

Evaluación del riesgo de caídas en adultos mayores con Diabetes Mellitus tipo 2 / Evaluation of fall risk assessmentin in older adults with Type 2 Diabetes Mellitus / Avaliação do risco de quedas em idosos com Diabetes Mellitus tipo 2

Introducción: La diabetes mellitus 2 es una enfermedad frecuente en adultos mayores, con múltiples complicaciones que pueden llegar a afectar el equilibrio y la marcha e incrementar el riesgo de caída. Objetivo: Determinar el riesgo de caídas en dos grupos de adultos mayores, uno con padecimiento de DM2 y otro sin este padecimiento. Metodología: Estudio de enfoque cuantitativo, alcance descriptivo, diseño observacional, y de cohorte transversal; muestra poblacional de 120 adultos mayores en la ciudad de Guayaquil divididos en dos grupos: grupo A con 60 adultos mayores que no padecían DM2 y grupo B con 60 adultos mayores con DM2; que cumplen con los criterios de inclusión y a quienes se evalúan mediante las técnicas: observación, evaluación y entrevista; y los instrumentos: Escala de Berg, Mini-BESTest y formulario estándar. Se utilizó la prueba estadística Chi cuadrado para la comparación de los resultados obtenidos. Resultados: Los resultados indican que, en la determinación del riesgo de caídas, se encontraron diferencias estadísticamente significativas (p0.05). El estudio además encontró que los resultados obtenidos, en las dos pruebas de riesgo de caídas, difieren entre sí. Conclusiones: Los adultos mayores diabéticos presentan un mayor riesgo de caída a comparación de adultos mayores no diabéticos.

Introduction: Diabetes mellitus 2 is a common disease in older adults, with multiple complications that can affect balance and gait and increase the risk of falling. Objective: To determine the risk of falls in two groups of older adults, one with and the other without DM2. Methodology: Quantitative approach study, descriptive scope, observational design, and cross-sectional cohort; population sample of 120 older adults in the city of Guayaquil divided into two groups: group A with 60 older adults who did not suffer from DM2 and group B with 60 older adults with DM2; who meet the inclusion criteria and who are evaluated by means of the techniques: observation, evaluation and interview; and the instruments: Berg scale, Mini-BESTestest and standard form. The Chi-square statistical test was used to compare the results obtained. Results: The results indicate that, in the determination of the risk of falls, statistically significant differences (p0.05) were found. The study further found that the results obtained, in the two fall risk tests, differed from each other. Conclusions: Diabetic older adults present a higher risk of falling compared to non-diabetic older adults.

Introdução: O diabetes mellitus tipo 2 é uma doença comum em idosos, com múltiplas complicações que podem afetar o equilíbrio e a marcha e aumentar o risco de quedas. Objetivo: Determinar o risco de quedas em dois grupos de idosos, um com DM2 e outro sem essa condição. Metodologia: Estudo com abordagem quantitativa, escopo descritivo, desenho observacional e coorte transversal; amostra populacional de 120 idosos da cidade de Guayaquil dividida em dois grupos: grupo A com 60 idosos que não sofriam de DM2 e grupo B com 60 idosos com DM2; que atendam aos critérios de inclusão e que sejam avaliados pelas técnicas: observação, avaliação e entrevista; e os instrumentos: Escala de Berg, Mini-BESTest e formulário padrão. O teste estatístico Qui-quadrado foi utilizado para comparação dos resultados obtidos. Resultados: Os resultados indicam que, na determinação do risco de quedas, foram encontradas diferenças estatisticamente significativas (p0,05). O estudo também constatou que os resultados obtidos nos dois testes de risco de queda diferem entre si. Conclusões: Idosos diabéticos apresentam maior risco de queda em comparação aos idosos não diabéticos.

Comparativo da especificidade das escalas de Tinetti e SPPB na avaliação de idosos saudáveis e com disfunções neuromotoras no sul de Goiás / Comparison of the specificity of the tinetti and sppb scales in the assessment of healthy elderly people and those with neuromotor dysfunctions in southern Goiás

Introdução: o aumento da população idosa no mundo e as alterações fisiológicas decorrentes desse processo refletem a necessidade de boas ferramentas de avaliação para a identificação precoce de possíveis declínios. Objetivo: comparar os achados da avaliação pelas escalas Short Physical Performance Battery (SPPB) e Índice de Equilíbrio e Marcha de Tinetti validadas no Brasil, verificando a especificidade de cada escala na avaliação de idosos saudáveis e com disfunções neuromotoras. Métodos: 76 indivíduos, 43 saudáveis e 33 com disfunção neuromotora, de ambos os sexos, com idade mínima de 60 anos, residentes nos municípios de Caldas Novas-GO, Itumbiara-GO e Goiatuba-GO, foram avaliados em dias alternados pelas escalas SPPB e Tinetti. Resultados: os grupos apresentaram pontuações maiores nas avaliações pelo Índice Tinetti, o que sugere maior sensibilidade da SPPB na avaliação da marcha e do equilíbrio desses indivíduos. Conclusão: SPPB mostrou-se mais específica que o Índice de Tinetti, sendo capaz de detectar alterações que o Índice Tinetti não foi capaz de encontrar.

Introduction: the increase in the elderly population in the world and the physiological changes resulting from this process reflect the need for good assessment tools for the early identification of possible declines. Objective: to compare the assessment findings by the Short Physical Performance Battery (SPPB) and Tinetti's Balance and Gait Index validated in Brazil, verifying the specificity of each scale in the assessment of healthy elderly people and those with neuromotor dysfunctions. Methods: 76 individuals, 43 healthy and 33 with neuromotor dysfunction, of both sexes, aged at least 60 years, living in the cities of Caldas Novas-GO, Itumbiara-GO and Goiatuba-GO, were evaluated on alternate days by the SPPB and Tinetti scales. Results: the groups presented higher scores in the evaluations by Tinetti, which suggests greater sensitivity of the SPPB in the evaluation of gait and balance of these individuals. Conclusion: SPPB was more specific than Tinetti, being able to detect changes that the Tinetti Index was not able to find.

Comparação do desempenho funcional e parâmetros cinemáticos da marcha em idosos com fragilidade e saudáveis / Comparison of functional performance and kinematic gait parameters in frail and healthy elderly people

Objetivo: Comparar o desempenho funcional e as alterações cinemáticas da marcha em idosos saudáveis e em idosos com manifestações da síndrome da fragilidade, viventes na comunidade. Métodos: Estudo transversal do tipo caso-controle. Participaram do estudo 15 idosos, viventes na comunidade, separados em dois grupos, de acordo com a presença de manifestações de fragilidade: (n = 10) e controle (n = 5). Foram coletados dados sobre desempenho funcional, capacidade aeróbia, presença da síndrome da fragilidade e avaliação cinemática da marcha. Foram utilizados testes como: TC400m, dinamometria e SPPB. Para a análise de dados, foi utilizado o pacote estastístico PASW 18.0 (SPSS inc). Resultados: O tempo no teste de caminhada de 400m foi 11 segundos maior no grupo com sinais de fragilidade (p = 0,03), e a força de preensão palmar foi 25,8% maior no grupo sem fragilidade (p = 0,01). Conclusão: Concluimos que idosos frágeis possuem declínio no desempenho funcional em testes que avaliam a resistência aeróbia e a força muscular.

Objective: To compare functional performance and kinematic gait abnormalities in healthy elderly people and in elderly people with manifestations of the frailty syndrome, living in the community. Methods: A cross-sectional case-control study. Fifteen elderly people, living in the community, participated in the study. They were separated into two groups, according to the presence of manifestations of frailty (n = 10) and control (n = 5). Data on functional performance, aerobic capacity, presence of frailty syndrome, and kinematic gait assessment were collected. Tests, such as: TC400m, dynamometry, and SPPB were used. For data analysis, the statistical package PASW 18.0 (SPSS inc) was used. Results: The time in the 400m walk test was 11 seconds higher in the group with signs of frailty (p = 0.03), and handgrip strength was 25.8% higher in the group without frailty (p = 0.01). Conclusion: We conclude that frail elderly people have a decline in functional performance in tests that assess aerobic resistance and muscle strength.

Improving walking via real-time visual feedback after stroke in treadmill training (RE-VISIT): a protocol for randomized controlled trial / Melhorando a caminhada por meio de feedback visual em tempo real após acidente vascular cerebral em treinamento em esteira (RE-VISIT): um protocolo para ensaio clínico randomizado

BACKGROUND: After a stroke, most patients often suffer reduced walking ability and balance. Restoring walking ability and improving balance are major goals of stroke rehabilitation. Treadmills are often used in clinical setups to achieve these goals. Adding dimensions to the visual feedback in addition to the mirror for real-time frontal view is proven to enhance the gait. It is, therefore, important to design additional real-time visual feedback in treadmill training, in particular for the sagittal view involved side. OBJECTIVE: The objective of this study is to test if the real-time sagittal visual feedback during treadmill training is superior to the conventional mirror feedback treadmill training program of equivalent intensity in improving walking speed and balance after stroke. METHODS/DESIGN: The RE-VISIT trial (Real-time Visual feedback after Stroke in Treadmill training) is registered in the Clinical Trial Registry of India (CTRI/2023/10/058299). In this two-arm randomized control trial, which will be a single-blinded study, 42 eligible stroke survivors undergoing rehabilitation will be randomly allocated (1:1 ratio) to either real-time visual sagittal feedback along with front mirror (experimental) group or only front mirror treadmill training (control) group, all the participants will receive 15 sessions of treadmill training for up to 15 min at a safe self-selected speed over 5-6 weeks. The RE-VISIT (experimental) group will receive real-time, visual sagittal view feedback of the involved lower limb trajectory along with the routine front mirror view during treadmill training and will be asked to modify their gait pattern. The control group will receive treadmill walking training only with the routine front mirror view feedback. Clinical and gait assessments will be conducted at the baseline, immediately following the final session of training, and at the 9th week during follow-up. The outcome measures of interest are walking speed (primary) and balance (secondary), which will be measured prior to baseline, post 15 sessions of training, and at the 9th week following training. DISCUSSION: This REVISIT trial will provide insight and contribute to the existing innovation and modifications of incorporating realtime visual feedback during treadmill training in post-stroke gait rehabilitation. The findings will help the better designing of a gait rehabilitation program with a treadmill for post-stroke subjects to improve walking speed, and balance for those who have greater difficulties in community ambulation. We anticipate that those in the REVISIT training will demonstrate improved walking ability.

CONTEXTO: Após o acidente vascular cerebral, a maioria dos pacientes frequentemente sofre redução da capacidade de caminhar e do equilíbrio. Restaurar a capacidade de caminhar e melhorar o equilíbrio são os principais objetivos da reabilitação do AVC. As esteiras são frequentemente usadas em ambientes clínicos para atingir esses objetivos. Está comprovado que adicionar dimensões ao feedback visual, além do espelho para visão frontal em tempo real, melhora a marcha. É, portanto, importante projetar feedbacks visuais adicionais em tempo real no treinamento em esteira, em particular para o lado envolvido na visão sagital. OBJETIVO: O objetivo deste estudo é testar se o feedback visual sagital em tempo real durante o treinamento em esteira é superior ao programa de treinamento em esteira com feedback de espelho convencional de intensidade equivalente na melhoria da velocidade de caminhada e equilíbrio após acidente vascular cerebral. MÉTODOS/ DESENHO: O ensaio RE-VISIT (feedback visual em tempo real após acidente vascular cerebral no treinamento em esteira) está registrado no Registro de Ensaios Clínicos da Índia (CTRI/2023/10/058299). Neste ensaio de controle randomizado de dois braços, que será um estudo cego, 42 sobreviventes de AVC elegíveis em reabilitação serão alocados aleatoriamente (proporção de 1:1) para feedback sagital visual em tempo real junto com grupo de espelho frontal (experimental) ou apenas Grupo de treinamento em esteira com espelho frontal (controle), todos os participantes receberão 15 sessões de treinamento em esteira por até 15 minutos em uma velocidade segura e autosselecionada durante 5-6 semanas. O grupo RE-VISIT (experimental) receberá feedback visual em tempo real da visão sagital da trajetória dos membros inferiores envolvidos, juntamente com a visão rotineira do espelho frontal durante o treinamento em esteira e será solicitado a modificar seu padrão de marcha. O grupo de controle receberá treinamento de caminhada em esteira apenas com o feedback rotineiro da visão do espelho frontal. Avaliações clínicas e de marcha serão realizadas no início do estudo, imediatamente após a sessão final de treinamento e na 9ª semana durante o acompanhamento. As medidas de resultados de interesse são a velocidade de caminhada (primária) e o equilíbrio (secundário), que serão medidos antes da linha de base, após a 15ª sessão de treinamento e na 9ª semana após o treinamento. DISCUSSÃO: este ensaio REVISIT fornecerá insights e contribuirá para a inovação e modificações existentes na incorporação de feedbacks visuais em tempo real durante o treinamento em esteira na reabilitação da marcha pós-AVC. As descobertas ajudarão no melhor desenho de um programa de reabilitação da marcha com esteira para indivíduos pós-AVC para melhorar a velocidade de caminhada e o equilíbrio para aqueles que têm maiores dificuldades na deambulação comunitária. Prevemos que aqueles no treinamento REVISIT demonstrarão melhor capacidade de caminhada.

Characterization of temporal and intensity parameters of early postural adjustment phase during gait initiation in stroke patients / 中国组织工程研究

BACKGROUND:Early postural adjustments serve as preparatory measures for forthcoming actions or potential disruptions in posture,thereby facilitating improved movement execution and mitigating destabilizing effects caused by posture interference. OBJECTIVE:To investigate the characteristics of temporal and intensity parameters of key lower limb muscles during early postural adjustment phase when stroke patients with varying levels of balance initiate walking at a self-selected comfortable pace. METHODS:The characteristics of early postural adjustments in 16 stroke patients were observed.Sixteen patients were divided into a non-fall group(n=8)and a fall group(n=8)based on the history of falls and Berg Balance Scale scores.Noraxon inertial sensors and Noraxon Ultium EMG wireless surface electromyography were utilized to collect body kinematic data and surface electromyography data during gait initiation.Muscle activation time and activation sequence of six key muscles in the lower limbs(tibialis anterior,medial and lateral gastrocnemius,rectus femoris,lateral femoris and biceps femoris muscles)during the early postural adjustment phase,as well as normalized electromyography integral values for the four time windows(each 150 ms)before gait initiation,were analyzed. RESULTS AND CONCLUSION:Stroke patients with a history of falls exhibited earlier activation times for the six key muscles in the lower limbs during gait initiation compared with those in the non-fall group.The fall group demonstrated significantly earlier activation times for tibialis anterior,lateral head of gastrocnemius,and vastus lateralis(P<0.01,P<0.05).In contrast,the non-fall group displayed a consistent pattern of activating extensor muscles before flexor muscles,with thigh muscle activation preceding calf muscle activation.However,in the fall group,calf extensor muscle activation occurred prior to thigh extensor muscle activation,and the vastus lateralis was activated even earlier.The tibialis anterior was the last activated muscle in both groups.Specifically during T3(>-300 to-150 ms),the tibialis anterior exhibited significantly higher activity in the fall group compared with the non-fall group(P<0.05),while the lateral head of gastrocnemius demonstrated significant inhibition during T3(P<0.05)and the medial head of gastrocnemius showed significant inhibition during both T3 and T4(>-150 to 0 ms)stages compared with the non-fall group(P<0.01,P<0.05).To conclude,stroke patients with varying balance abilities employ distinct early postural adjustment strategies prior to stepping,as evidenced by differences in muscle activation timing,recruitment order,and muscle activity amplitude.Patients at a high risk of falling exhibit prolonged duration of early postural adjustment and delayed initiation of gait,indicating earlier activation of the tibialis anterior muscle and inhibition of gastrocnemius muscle activity.These delays in gait initiation and variations in muscle recruitment strategies may contribute to unstable posture and an increased susceptibility to falls.

Effect of ginsenoside Rg1 on muscle degeneration after massive rotator cuff injury in mice / 中国组织工程研究

BACKGROUND:Rotator cuff muscle degeneration(muscle atrophy,fibrosis and fatty infiltration)is a common condition after rotator cuff tears,which seriously affects shoulder function and surgical outcomes.Ginsenoside Rg1 has biological effects such as anti-oxidation,anti-apoptosis and lipid-lowering.However,the effect of ginsenoside Rg1 on muscle degeneration after rotator cuff tear has not been reported. OBJECTIVE:To investigate the effect of ginsenoside Rg1 on muscle degeneration after massive rotator cuff tear in mice. METHODS:Sixty C57BL/6J mice were randomly divided into sham group,model group,ginsenoside Rg1 low dose group and ginsenoside Rg1 high dose group,with 15 mice in each group.The skin of the right shoulder of mice in the sham group was cut and sutured.Massive rotator cuff tear mouse models of the right shoulder were established in the other three groups.Supraspinatus tendon and suprascapular nerve compression were administrated.Mice in the sham and model groups were intraperitoneally injected with 0.5 mL of saline after operation,while those in the ginsenoside Rg1 low and high dose groups were intraperitoneally injected with ginsenoside Rg1 30 and 60 mg/kg respectively,once a day,for 6 weeks.Mice were assessed for limb function by gait analysis the day after the last injection.After euthanasia,the supraspinatus muscle on the operated side was taken to measure the muscle atrophy rate and muscle contractility.Muscle tissue was stained with oil red O and Masson.RT-PCR was used to detect the expression of atrophy,fibrosis,and fatty infiltration related genes. RESULTS AND CONCLUSION:Compared with the model group,low-and high-dose ginsenoside Rg1 significantly increased paw print area and step length(P<0.05).Compared with the model group,low-and high-dose ginsenoside Rg1 significantly increased myofiber cross-sectional area and supraspinatus contractility(P<0.05),and significantly decreased wet muscle mass reduction ratio,fatty infiltration area ratio,and collagen fiber area ratio(P<0.05).Compared with the model group,low-and high-dose ginsenoside Rg1 significantly decreased the expression of atrophy,fibrosis,and fatty infiltration related genes(P<0.05).There was no significant difference in paw print area,supraspinatus muscle contractility,and myofiber cross-sectional area between ginsenoside Rg1 low and high dose groups(P>0.05),and all other indexes were better in the ginsenoside Rg1 high dose group than in the ginsenoside Rg1 low dose group(P<0.05).To conclude,ginsenoside Rg1 could significantly reduce muscle atrophy,fibrosis and fatty infiltration following massive rotator cuff tear in mice,which is beneficial to improve muscle strength and limb function.

Spatio-temporal gait characteristics of the elderly and the risk of adverse health outcomes / 中国组织工程研究

BACKGROUND:Gait is one of the optimal indicators of functional status in older adults.Gait parameters are associated with adverse health outcomes in older adults. OBJECTIVE:To summarize and compare the practical value of gait parameters,and to review the progress of research on spatio-temporal parameters and the risk of adverse health outcomes in older adults. METHODS:PubMed,Web of Science,and CNKI were searched for relevant literature published from January 2010 to June 2023 using the search terms of"gait speed,walking speed,step length,cadence,step frequency,step time,walking base,aged and elderly"in English and Chinese,respectively.A total of 52 papers were finally included for the systematic review. RESULTS AND CONCLUSION:Currently,researchers have focused on three basic temporal-spatial parameters,namely,step speed,step length and step frequency,to explore their association with adverse health outcomes in older adults.Reduced gait speed in older adults may increase the risk of falls,all-cause mortality,and may be an independent predictor of all-cause mortality.Older adults with slow gait speed are at higher risk of cognitive decline,and may be the preferred gait parameter in assessing cognitive impairment in older adults.Older adults with slow gait speed are more likely to have debilitating or common chronic illnesses,and are at higher risk of hospitalization and public care.Step length is positively correlated with individual height and lower limb length,but age-induced shortening of step length is not related to height or lower limb length,and shortening of step length reflects reduced physical function in older adults,and shortening of step length is a risk factor for falls and cognitive decline in older adults.Stride frequency is often used as a measure of exercise intensity,and a stride frequency of≥100 steps/minute is predictive of all-cause mortality,and slowing of step frequency may lead to a higher risk of falls,hospitalization and all-cause mortality in older adults.Changes in gait parameters are closely related to the level of physical fitness in older adults,and there may be a bidirectional relationship between the two.The results of the study will provide a theoretical basis for further improving risk screening in clinical populations,refining health risk assessment in the elderly,improving health protection and promoting active health in the elderly.

Propulsion deficits in hemiplegic gait of stroke patients / 中国组织工程研究

BACKGROUND:The abnormal gait of stroke patients seriously affects their propulsive force during walking,which subsequently reduces their walking speed,walking distance,and stability,increases their risk of falls,and seriously affects their quality of life. OBJECTIVE:To review the relevant research on propulsive force deficits in stroke patients with hemiplegia,to summarize the understanding of existing researchers on propulsive force deficits,to analyze the relationship between propulsive force and gait,and finally to explain and compare the latest rehabilitation technologies used to improve propulsive force deficits,providing reference for clinical treatment. METHODS:Relevant literature was retrieved from WanFang,CNKI,PubMed,and Web of Science Core Collection through computer search.The Chinese and English search terms were"propulsive force OR propulsive,stroke OR cerebral infarction OR hemiplegia,walk* OR gait."The search time limit was from 2003 to 2023,and 71 articles were finally included for review and analysis. RESULTS AND CONCLUSION:Training targeting the hip and ankle joints may be more effective for patients'walking function,especially training with the application of flexible exoskeleton robots,but more sufficient evidence is still needed to use propulsion as a prognostic indicator of walking function in stroke patients.Biomechanical variables related to propulsive force include:the hip joint extension angle at terminal stance,ankle joint dorsiflexion torque,and knee joint extension.Damage to the corticospinal tract,cerebellar-cortical pathways,and the reticulospinal tract in hemiplegic patients are associated with reduced propulsive force and gait asymmetry.Propulsive force is crucial for the stability of healthy gait,and a decrease in propulsive force is unfavorable for gait stability.Gait symmetry is correlated with propulsive force,stride length symmetry,trunk displacement,and lower limb swing ability,with propulsive force being a key factor.Propulsive force can serve as a quantitative indicator for assessing the gait of hemiplegic patients,and evaluation of gait using propulsive force is beneficial for the long-term development of walking ability.Main rehabilitation techniques for improving propulsive force include:lower limb exoskeleton robot walking training,treadmill training combined with functional electrical stimulation,adaptive speed treadmill training,biofeedback technology,and whole-body vibration training.Among them,whole-body vibration training and biofeedback technology are more effective.The specific contributions and mechanisms of the hip,knee,and ankle joints in improving propulsive force are still controversial,but it is expected that the contributions of the hip and ankle joints are greater.Focusing on the improvement of propulsive force as a rehabilitation goal may yield more sustainable advancements in walking function.However,several current challenges persist in this field:understanding the neurobiological basis of propulsive force deficits in stroke patients,assessing the long-term efficacy of current rehabilitation techniques for enhancing propulsive force,and determining the most suitable patient populations for the application of major rehabilitation techniques aiming at improving propulsive force.These areas require further exploration by subsequent researchers.

Sensitivity factor analysis of asymmetric gait quality evaluation model based on random forest algorithm / 中国组织工程研究

BACKGROUND:The assessment of asymmetric gait quality plays a pivotal role in guiding rehabilitation training;however,the link between gait quality and kinematic-kinetic gait parameters remains ambiguous. OBJECTIVE:To formulate a machine-learning model for evaluating gait quality based on gait parameters,identify factors sensitive to gait quality from asymmetric gait parameters,investigate the relationship between gait indicators and gait quality,and provide guidance for asymmetric gait training and rehabilitation. METHODS:An asymmetric gait database was established through the creation of asymmetric conditions.Kinematic and kinetic data were collected from 8 young and 8 elderly subjects(all male,right dominant population)during gait tests.Gait quality for each test data set was assessed using symmetry indices,resulting in the creation of a gait parameter-gait quality dataset.Utilizing the Random Forest algorithm,a gait quality evaluation model was developed and key quality parameter factors were identified through differential analysis.This model was iteratively refined.The model's performance was evaluated through 10-fold cross-validation,and its effectiveness was verified using the cross-validation dataset. RESULTS AND CONCLUSION:(1)A gradient test was designed to categorize gait quality into optimal,suboptimal,intermediate,and poor groups,with 759,329,133,and 125 instances,respectively.(2)The application of the Random Forest algorithm in gait quality assessment was explored.A relationship model was established between gait indicators and gait quality,yielding a predictive model accuracy of 95.99%.(3)The 13 main parameters significantly influencing asymmetric gait quality were identified through the Random Forest model's feature importance ranking.(4)An analysis of gait quality sensitivity factors using the 13 important parameters led to the identification of five key sensitivity indexes.The Random Forest model utilizing these sensitivity factors achieved a predictive accuracy of 94.20%.

Analysis of Plantar Pressure Patterns and the Hazards of In-Toeing Gait for College Students / 医用生物力学

Objective Taking Chinese college students as the target group,this study detected the distribution of plantar pressure in different gait groups and analyzed the distribution characteristics of plantar pressure in in-toeing gait populations,to provide references for their orthopedic rehabilitation.Methods Ten subjects with typical in-toeing and normal and out-toeing gaits were selected to participate in the plantar pressure testing experiment.The maximum force,pressure,and contact time during natural standing and during one walking gait cycle were measured using a Zebris foot plantar pressure measurement system.Gait parameters,including step length,step width,step speed,step direction angle,gait center line,and force change curves,were collected,and a hazard analysis was conducted.Results During natural standing,the swaying interval area of the center of pressure was 939.0±252.4 mm2 for the in-toeing gait group and 1 120.2±101.6 mm2 for the out-toeing gait group,which was larger than that for the normal group(240.7±130.6 mm2).The in-toeing gait further weakens the human body's ability to maintain stability.The dynamic and static plantar pressures in the three gait groups exhibited different distribution characteristics.During static standing,the pressure center of the in-toeing gait group shifted to the hindfoot,which accounted for 70%of the plantar pressure and was higher than that of the normal group.During dynamic walking,the absolute value of peak pressure in the tripodal area of the foot in the in-toeing gait group was higher than that in the other two groups.Conclusions The in-toeing gait group had poor static maintenance ability,and to a certain extent,the distribution of plantar pressure in the foot tripodal area and plantar zone pressure were different compared with that of the normal gait.This led to poor stability,easy muscle fatigue,and ankle and knee joint injuries in the in-toeing gait group under equal-intensity exercise conditions.

Effects on different frequencies of whole body vibration on gross motor function and walking function in children with dyskinetic cerebral palsy / 实用医学杂志

Objective To provide reference for the subsequent clinical application of WBV,based on the impacts of whole body vibration(WBV)with different frequencies on gross motor function and walking function in children with dyskinetic cerebral palsy.Methods 60 children aged 6～12 with dyskinetic cerebral palsy,who had been treated at the department of rehabilitation medicine in the Affiliated Southwest Medical University from October 2021 to November 2022,were selected.They were randomly divided into a control group(n = 20),(25±5)Hz group(n = 20),and(35±5)Hz group(n = 20).All the three groups received conventional rehabilitation,while the(25±5)Hz group received additional WBV with(25±5)Hz and the(35±5)Hz group received WBV with(35±5)Hz.They were treated for eight weeks.The scores on D and E domains of GMFM-88,TUGT,the score on Berg Balance Scale,and footprint analysis were used for assessment of the efficacy after treatment.Results As compared with the baselines,the scores were improved in the three groups after treatment(P＜0.001).BBS(F = 12.502),TUGT(F = 8.211),scores on D and E domains of GMFM-88(F = 12.802 and 8.505),stride length(F = 12.279),1MWT distance(F = 12.619),and step width(F = 13.582)were better in the(35±5)Hz group than in the(25±5)Hz group and the control group(P＜0.05 and P＜0.01);and the efficacy was better in the(25±5)Hz group than in the control group,the difference was statistically significant(P＜0.05 and P＜0.01).Conclusion WBV can improve trunk control,lower limb gross motor function,and walking function in children with involuntary motor type cerebral palsy.(35±5)Hz is better than(25±5)Hz for the efficacy of WBV.

Efficacy of rehabilitation exoskeleton robots on post-stroke lower limb motor dysfunction:a Meta-analysis / 中国组织工程研究

OBJECTIVE:To systematically evaluate the efficacy of rehabilitation exoskeleton robots on the lower limb motor function of stroke patients using Meta-analysis and to compare the efficacy of different lower limb exoskeleton robots,so as to provide a theoretical basis for the scientific selection of suitable exoskeleton robots for patients with post-stroke lower limb motor dysfunction. METHODS:Computer searches of the Cochrane Library,PubMed,Web of Science,Embase,CNKI,VIP,and WanFang Data were conducted to collect randomized controlled clinical studies on exploring lower extremity rehabilitation exoskeleton robots to improve lower limb motor function in stroke patients published from database inception to November 2022.Two researchers conducted the literature search and screening.The quality of the included literature was evaluated using the Cochrane 5.1.0 risk of bias assessment tool and the Jadad scale.Meta-analysis was performed using RevMan 5.4 and Stata 17.0 software. RESULTS:(1)Finally 22 publications were included,involving 865 patients(n=436 in the test group and n=429 in the control group),and the Jadad score showed that all the included articles were of high quality.(2)Meta-analysis results showed that the exoskeleton robot significantly improved the Fugl-Meyer Assessment of Lower Extremity score(mean difference[MD]=2.63,95%confidence interval[CI]:1.87-3.38,P<0.05),Berg Balance Scale score(MD=3.62,95%CI:1.21-6.03,P<0.05),Timed Up and Go score(MD=-2.77,95%CI:-4.48 to-1.05,P<0.05)and step frequency score(MD=3.15,95%CI:1.57-4.72,P<0.05)in stroke patients compared with the control group.However,there was no significant improvement in the Functional Ambulation Category Scale score(MD=0.30,95%CI:-0.01 to 0.61,P>0.05)and 6-minute walk test score(MD=3.77,95%CI:-6.60 to 14.14,P>0.05).(3)Network Meta-analysis results showed that compared with the conventional rehabilitation therapy,both the level-walking exoskeleton(MD=10.23,95%CI:3.81-27.49,P<0.05)and the body-weight support exoskeleton(MD=33.66,95%CI:11.49-98.54,P<0.05)improved the Fugl-Meyer Assessment of Lower Extremity score.Compared with the conventional rehabilitation therapy,body-weight support exoskeleton significantly improved the Berg Balance Scale scores(MD=79.86,95%CI:2.34-2 725.99,P<0.05).In terms of Fugl-Meyer Assessment of Lower Extremity and Berg Balance Scale scores,the ranking results were body-weight support exoskeleton>level-walking exoskeleton>conventional rehabilitation therapy.Compared with the conventional rehabilitation therapy,level-walking exoskeleton significantly improved the Functional Ambulation Category Scale score(MD=1.38,95%CI:1.00-1.90,P<0.05)and body-weight support exoskeleton significantly improved the Timed Up and Go score(MD=0.07,95%CI:0.01-0.51,P<0.05).In terms of Functional Ambulation Category Scale and Timed Up and Go scores,the ranking results were level-walking exoskeleton>body-weight support exoskeleton>conventional rehabilitation therapy. CONCLUSION:Rehabilitation exoskeleton robots can improve balance,walking and activities of daily living in stroke patients,with body-weight support exoskeleton being more effective in improving lower limb motor function and balance and level walking exoskeleton being more effective in improving functional walking and transfer.

Effect of foot progression angle on lower extremity kinetics of knee osteoarthritis patients of different ages:a systematic review and meta-analysis / 中国组织工程研究

OBJECTIVE:Knee adduction moment and knee adduction angular impulse enlargement is the main biomechanical risk factor of knee osteoarthritis.According to the survey,a change in the foot progression angle could effectively change the motion mode of patients with knee osteoarthritis.However,the impact of toe-in and toe-out on knee adduction moment and knee adduction angular impulse in young and elderly patients did not reach a consensus.Therefore,this study comprehensively discussed the effect of foot progression angle on knee adduction moment and knee adduction angular impulse in different populations through meta-analysis and provided a reference for the treatment of knee osteoarthritis. METHODS:By June 2022,searches were conducted on Web of Science,EBSCO,PubMed and CNKI databases using"foot progression angle,knee adduction moment,knee adduction angular impulse,gait"as Chinese and English search terms.Self-controlled randomized controlled studies analyzing the effects of toe-in and toe-out on knee adduction moment bimodality and knee adduction angular impulse were included.The cochrane bias risk assessment tool was utilized to make a quality evaluation of the literature.Stata 15.1 software was used for subgroup analysis to determine the effect of foot progression angle on knee adduction moment and knee adduction angular impulse.Meta-regression analysis was used to further determine characteristics of outcome indicators(knee adduction moment,knee adduction angular impulse)changing with foot progression angle. RESULTS:(1)A total of 15 self-control trials and 2 randomized controlled trials(455 subjects)were included in the meta-analysis.All of the included articles were of medium to high quality.(2)The meta-analysis results showed that the toe-in gait could reduce the first peak of knee adduction moment(SMD=-0.380,95%CI:-0.710 to-0.060,P=0.022)and knee adduction angular impulse(SMD=-1.470,95%CI:-2.160 to-0.770,P<0.001)in young patients.The toe-out gait reduced the second peak of knee adduction moment(SMD=-0.720,95%CI:-1.010 to-1.440,P<0.001)in young patients.In addition,toe-in gait could reduce the first peak of knee adduction moment in elder patients(SMD=-0.550,95%CI:-0.800 to-0.300,P<0.001),but increase the second peak knee adduction moment of elderly(SMD=0.280,95%CI:-0.010 to 0.560,P=0.047).The toe-out gait could decrease the second peak knee adduction moment in this population(SMD=-0.510,95%CI:-0.830 to-0.190,P=0.002).(3)Meta-regression showed that the greater the toe-out in elderly patients,the lower the second peak knee adduction moment. CONCLUSION:(1)Toe-in reduced the first peak knee adduction moment and knee adduction angular impulse in young knee osteoarthritis patients aged 18 to 34 years.Since knee adduction moment and knee adduction angular impulse were associated with medial knee loading and knee osteoarthritis incidence,toe-in gait intervention may be a suitable rehabilitation strategy for young patients.(2)Toe-in increased the second peak of knee adduction moment in older knee osteoarthritis patients over 60 years of age,which may exacerbate knee osteoarthritis in this population.However,the second peak of knee adduction moment during walking in this population decreases as the toe-out increases,contributing to a reduction in medial knee loading,suggesting that older patients may consider using toe-out gait during walking.

Correlation of knee extensor muscle strength and spatiotemporal gait parameters with peak knee flexion/adduction moment in female patients with knee osteoarthritis / 中国组织工程研究

BACKGROUND:Previous studies have shown that knee joint moment changes in patients with knee osteoarthritis,but there are few reports on the correlation of moment changes with knee extensor muscle strength and gait spatiotemporal parameters. OBJECTIVE:To explore the correlation of knee extensor muscle strength and gait spatiotemporal parameters with peak knee flexion moment and knee adduction moment in female patients with knee osteoarthritis. METHODS:Twenty knee osteoarthritis female patients with single knee disease hospitalized in Guizhou Hospital,Beijing Jishuitan Hospital from February to August 2022 were selected as the knee osteoarthritis group,and an additional 20 healthy females without musculoskeletal disease were selected as the control group.The knee extensor force at 60(°)/s was measured with the Biodex isokinetic instrument.The gait spatiotemporal parameters and peak knee flexion moment and knee adduction moment were collected with the Italian BTS infrared motion capture system and force measuring platform.Pearson correlation analysis was used to explore the correlation of muscle strength and gait spatiotemporal parameters with peak knee adduction moment and knee flexion moment,and the variables significantly related to knee joint moment were further included in the multiple stepwise regression analysis. RESULTS AND CONCLUSION:(1)Compared with the control group,the knee osteoarthritis group had significantly lower knee extensor force,step speed,step frequency,step length,step width,peak knee adduction moment and knee flexion moment at 60(°)/s(P<0.05).(2)Pearson correlation analysis showed that the 60(°)/s centripetal extensor force,step speed,step frequency and step length were positively correlated with the peak knee flexion moment,and negatively correlated with the peak knee adduction moment,with a statistically significant difference(P<0.05).(3)The results of multiple stepwise regression showed that step speed and 60(°)/s knee extensor force were the strongest predictors of peak knee flexion moment,and the total R2 value of the two factors was 0.426,indicating that 42.6%of the total variance of this parameter could be explained.Step length and 60(°)/s centripetal extensor force were the strongest predictors of peak knee adduction moment.The total R2 value of the two factors was 0.602,indicating that 60.2%of the total variance of this parameter could be explained.(4)It is concluded that knee extensor strength,step speed and step length are the main variables affecting peak knee adduction moment and knee flexion moment.Therefore,these variables can be used for clinical gait monitoring and guidance to change knee joint load during knee osteoarthritis rehabilitation.

Biomechanics of reconstruction of total calcaneus defect using fibular flap based on finite element method / 中国组织工程研究

BACKGROUND:Calcaneal defects are common in clinical practice.It is difficult for surgeons to evaluate the effect of calcaneal reconstruction due to the complex anatomical structure and motor function of the heel.Finite element analysis has become an effective method for biomechanical behavior simulation and numerical analysis. OBJECTIVE:To compare the clinical effect and biomechanical characteristics of total calcaneal reconstruction with the Ⅱ-shaped and V-shaped fibular flap. METHODS:CT images of one left foot of a healthy 50-year-old male were acquired.Mimics software was used to obtain the preliminary three-dimensional model.Geomagic software was used to trim and curve the model.The model was imported into Solidworks software to simulate calcaneal reconstruction and complete the pre-processing of finite element calculation.Finally,Ansys software was used to solve the problem.The simulation results were compared with previous literature results to verify the effectiveness of the model.The surgical effect and biomechanical characteristics of the foot in different gait phases based on the simulated stress results were analyzed. RESULTS AND CONCLUSION:(1)Both Ⅱ-shaped and V-shaped fibular flaps could be used to reconstruct completely missing calcaneus,which could restore the length,width and height of normal calcaneus,and fill up the missing calcaneus bone.(2)Compared with the normal calcaneus,both configurations of fibular flaps showed a tendency for over-concentration of stress after loading.The normal calcaneus stress was mostly concentrated around the calcaneus nodule,the subtalar process and the calcaneus groove,while the stress of the two fibular flaps was mostly concentrated at the junction between the bone flap with the talus and cuboid bones.(3)The maximum stress of calcaneus was different between the two models and normal calcaneus under different simulation conditions,with statistically significant differences(P＜0.05).Compared with the V-shaped fibular flaps,Ⅱ-shaped fibular flaps had less force change in different gaits and were closer to the normal calcaneus.The V-shaped fibular flap bore excessive stress during the period of push-off,and the grafted bone material may yield under this condition and have the risk of fractures.

Stability of early gait after unicompartmental knee arthroplasty / 中国组织工程研究

BACKGROUND:For the patients who have undergone unicompartmental knee arthroplasty,although the surgical effect is clear,there is still a lack of effective quantitative evaluation tools,and it is necessary to further explore the early postoperative gait and stability changes. OBJECTIVE:To investigate the changes in gait and stability before and after unicompartmental knee arthroplasty. METHODS:From May 2021 to May 2022,30 patients aged(63.80±9.31)years who planned to perform unilateral unicompartmental knee arthroplasty in the Department of Joint Surgery,Affiliated Hospital of Xuzhou Medical University were selected as the unicompartmental knee arthroplasty group.15 healthy elderly patients aged(61.28±8.60)years without a history of hip and knee pain and hip and knee joint dysfunction were recruited as the control group.Hospital for special surgery scores,stability parameters(center of pressure path length,95%confidence ellipse area)and gait parameters(pace,stride length,stride frequency,gait cycle,and the proportion of single support period)were recorded and compared in the control group and unicompartmental knee arthroplasty group before operation,1 and 3 months after operation. RESULTS AND CONCLUSION:(1)There was no significant difference in the step frequency between the patients 1 month after operation and those before operation in the unicompartmental knee arthroplasty group(P＞0.05).The stability of 1 month after operation was worse than that before operation,and other parameters of 1 month after operation were better than those before operation,and the difference was statistically significant(P＜0.05).(2)Hospital for special surgery score,gait and stability parameters at 3 months after operation were better than those before operation(P＜0.05).(3)Compared with the control group,the pace,stride length,stride frequency,and the proportion of single support period of the unicompartmental knee arthroplasty group were significantly lower before and 3 months after operation.Center of pressure path length,95%confidence ellipse area and gait cycle were greater in the unicompartmental knee arthroplasty group than those in the control group,with statistically significant differences(P＜0.05).(4)It is indicated that gait analysis is an effective means to quantitatively evaluate the rehabilitation status after unicompartmental knee arthroplasty.The early gait recovery after unicompartmental knee arthroplasty is good,but the gait frequency improvement is not obvious and the stability is poor 1 month after the operation.