Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 29.860
Filtrar
1.
J Neural Eng ; 21(3)2024 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-38842111

RESUMO

Objective. Multi-channel electroencephalogram (EEG) technology in brain-computer interface (BCI) research offers the advantage of enhanced spatial resolution and system performance. However, this also implies that more time is needed in the data processing stage, which is not conducive to the rapid response of BCI. Hence, it is a necessary and challenging task to reduce the number of EEG channels while maintaining decoding effectiveness.Approach. In this paper, we propose a local optimization method based on the Fisher score for within-subject EEG channel selection. Initially, we extract the common spatial pattern characteristics of EEG signals in different bands, calculate Fisher scores for each channel based on these characteristics, and rank them accordingly. Subsequently, we employ a local optimization method to finalize the channel selection.Main results. On the BCI Competition IV Dataset IIa, our method selects an average of 11 channels across four bands, achieving an average accuracy of 79.37%. This represents a 6.52% improvement compared to using the full set of 22 channels. On our self-collected dataset, our method similarly achieves a significant improvement of 24.20% with less than half of the channels, resulting in an average accuracy of 76.95%.Significance. This research explores the importance of channel combinations in channel selection tasks and reveals that appropriately combining channels can further enhance the quality of channel selection. The results indicate that the model selected a small number of channels with higher accuracy in two-class motor imagery EEG classification tasks. Additionally, it improves the portability of BCI systems through channel selection and combinations, offering the potential for the development of portable BCI systems.


Assuntos
Interfaces Cérebro-Computador , Eletroencefalografia , Imaginação , Eletroencefalografia/métodos , Humanos , Imaginação/fisiologia , Algoritmos , Movimento/fisiologia
2.
Ann Med ; 56(1): 2361254, 2024 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38833367

RESUMO

INTRODUCTION: Injury rates in competitive alpine skiing are high. With current methods, identifying people at risk is expensive and thus often not feasible at the youth level. The aims of this study were (1) to describe the jump performance and movement quality of youth competitive alpine skiers according to age and sex, (2) to compare the jump distance among skiers of different sexes and movement quality grades, and (3) to assess the inter-rater grading reliability of the qualitative visual movement quality classification of such jumps and the agreement between live and video-based post-exercise grading. MATERIALS AND METHODS: This cross-sectional study is based on an anonymized dataset of 301 7- to 15-year-old competitive alpine skiers. The skiers performed two-legged forward triple jumps, whereby the jump distance was measured, and grades were assigned by experienced raters from the frontal and sagittal perspectives depending on the execution quality of the jumps. Furthermore, jumps were filmed and ultimately rated post-exercise. Differences in jump distance between various groups were assessed by multivariate analyses of variance (MANOVAs). Reliability was determined using Kendall's coefficient of concordance. RESULTS: The jump distance was significantly greater in U16 skiers than in U11 skiers of both sexes and in skiers with good execution quality than in those with reduced or poor execution quality. Overall, jump distance in U16 skiers significantly differed between female (5.37 m with 95% CI [5.21, 5.53]) and male skiers (5.90 m with 95%CI [5.69, 6.10]). Slightly better inter-rater grading reliability was observed for video-based post-exercise (strong agreement) ratings than for live ratings (moderate agreement). CONCLUSION: In competitive alpine skiers aged 7 to 15 years, jump performance increases with age, and around puberty, sex differences start to manifest. Our results highlight the importance of evaluating both jump distance and movement quality in youth skiers. To improve test-retest reliability, however, a video-based post-exercise evaluation is recommended.


In youth competitive alpine skiers, jump performance and movement quality matter, and both should be trained and tested.A qualitative assessment of movement quality while jumping by experts is a highly scalable and cost-effective approach; however, to ensure sufficient test-retest reliability, the assessment criteria need to be standardised and an additional video-based post-exercise assessment is recommended.


Assuntos
Desempenho Atlético , Esqui , Humanos , Esqui/fisiologia , Estudos Transversais , Adolescente , Feminino , Masculino , Criança , Desempenho Atlético/fisiologia , Desempenho Atlético/estatística & dados numéricos , Movimento/fisiologia , Reprodutibilidade dos Testes , Fatores Sexuais , Fatores Etários
3.
Sci Rep ; 14(1): 12860, 2024 06 04.
Artigo em Inglês | MEDLINE | ID: mdl-38834832

RESUMO

A common theory of motor control posits that movement is controlled by muscle synergies. However, the behavior of these synergies during highly complex movements remains largely unexplored. Skateboarding is a hardly researched sport that requires rapid motor control to perform tricks. The objectives of this study were to investigate three key areas: (i) whether motor complexity differs between skateboard tricks, (ii) the inter-participant variability in synergies, and (iii) whether synergies are shared between different tricks. Electromyography data from eight muscles per leg were collected from seven experienced skateboarders performing three different tricks (Ollie, Kickflip, 360°-flip). Synergies were extracted using non-negative matrix factorization. The number of synergies (NoS) was determined using two criteria based on the total variance accounted for (tVAF > 90% and adding an additional synergy does not increase tVAF > 1%). In summary: (i) NoS and tVAF did not significantly differ between tricks, indicating similar motor complexity. (ii) High inter-participant variability exists across participants, potentially caused by the low number of constraints given to perform the tricks. (iii) Shared synergies were observed in every comparison of two tricks. Furthermore, each participant exhibited at least one synergy vector, which corresponds to the fundamental 'jumping' task, that was shared through all three tricks.


Assuntos
Eletromiografia , Movimento , Músculo Esquelético , Humanos , Músculo Esquelético/fisiologia , Masculino , Adulto , Movimento/fisiologia , Feminino , Adulto Jovem , Fenômenos Biomecânicos , Patinação/fisiologia , Perna (Membro)/fisiologia
4.
Sci Rep ; 14(1): 13112, 2024 06 07.
Artigo em Inglês | MEDLINE | ID: mdl-38849348

RESUMO

Music provides a reward that can enhance learning and motivation in humans. While music is often combined with exercise to improve performance and upregulate mood, the relationship between music-induced reward and motor output is poorly understood. Here, we study music reward and motor output at the same time by capitalizing on music playing. Specifically, we investigate the effects of music improvisation and live accompaniment on motor, autonomic, and affective responses. Thirty adults performed a drumming task while (i) improvising or maintaining the beat and (ii) with live or recorded accompaniment. Motor response was characterized by acceleration of hand movements (accelerometry), wrist flexor and extensor muscle activation (electromyography), and the drum strike count (i.e., the number of drum strikes played). Autonomic arousal was measured by tonic response of electrodermal activity (EDA) and heart rate (HR). Affective responses were measured by a 12-item Likert scale. The combination of improvisation and live accompaniment, as compared to all other conditions, significantly increased acceleration of hand movements and muscle activation, as well as participant reports of reward during music playing. Improvisation, regardless of type of accompaniment, increased the drum strike count and autonomic arousal (including tonic EDA responses and several measures of HR), as well as participant reports of challenge. Importantly, increased motor response was associated with increased reward ratings during music improvisation, but not while participants were maintaining the beat. The increased motor responses achieved with improvisation and live accompaniment have important implications for enhancing dose of movement during exercise and physical rehabilitation.


Assuntos
Eletromiografia , Música , Recompensa , Humanos , Música/psicologia , Masculino , Feminino , Adulto , Adulto Jovem , Frequência Cardíaca/fisiologia , Movimento/fisiologia , Mãos/fisiologia , Desempenho Psicomotor/fisiologia , Motivação/fisiologia
5.
Sci Rep ; 14(1): 13090, 2024 06 07.
Artigo em Inglês | MEDLINE | ID: mdl-38849381

RESUMO

Face recognition is a crucial aspect of self-image and social interactions. Previous studies have focused on static images to explore the boundary of self-face recognition. Our research, however, investigates the dynamics of face recognition in contexts involving motor-visual synchrony. We first validated our morphing face metrics for self-face recognition. We then conducted an experiment using state-of-the-art video processing techniques for real-time face identity morphing during facial movement. We examined self-face recognition boundaries under three conditions: synchronous, asynchronous, and static facial movements. Our findings revealed that participants recognized a narrower self-face boundary with moving facial images compared to static ones, with no significant differences between synchronous and asynchronous movements. The direction of morphing consistently biased the recognized self-face boundary. These results suggest that while motor information of the face is vital for self-face recognition, it does not rely on movement synchronization, and the sense of agency over facial movements does not affect facial identity judgment. Our methodology offers a new approach to exploring the 'self-face boundary in action', allowing for an independent examination of motion and identity.


Assuntos
Reconhecimento Facial , Humanos , Feminino , Masculino , Reconhecimento Facial/fisiologia , Adulto , Adulto Jovem , Face/fisiologia , Movimento/fisiologia , Estimulação Luminosa/métodos , Movimento (Física) , Expressão Facial
6.
J Biomech ; 170: 112160, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38824704

RESUMO

A single depth camera provides a fast and easy approach to performing biomechanical assessments in a clinical setting; however, there are currently no established methods to reliably determine joint angles from these devices. The primary aim of this study was to compare joint angles as well as the between-day reliability of direct kinematics to model-constrained inverse kinematics recorded using a single markerless depth camera during a range of clinical and athletic movement assessments.A secondary aim was to determine the minimum number of trials required to maximize reliability. Eighteen healthy participants attended two testing sessions one week apart. Tasks included treadmill walking, treadmill running, single-leg squats, single-leg countermovement jumps, bilateral countermovement jumps, and drop vertical jumps. Keypoint data were processed using direct kinematics as well as in OpenSim using a full-body musculoskeletal model and inverse kinematics. Kinematic methods were compared using statistical parametric mapping and between-day reliability was calculated using intraclass correlation coefficients, mean absolute error, and minimal detectable change. Keypoint-derived inverse kinematics resulted in significantly smaller hip flexion (range = -9 to -2°), hip abduction (range = -3 to -2°), knee flexion (range = -5° to -2°), and greater dorsiflexion angles (range = 6-15°) than direct kinematics. Both markerless kinematic methods had high between-day reliability (inverse kinematics ICC 95 %CI = 0.83-0.90; direct kinematics ICC 95 %CI = 0.80-0.93). For certain tasks and joints, keypoint-derived inverse kinematics resulted in greater reliability (up to 0.47 ICC) and smaller minimal detectable changes (up to 13°) than direct kinematics. Performing 2-4 trials was sufficient to maximize reliability for most tasks. A single markerless depth camera can reliably measure lower limb joint angles, and skeletal model-constrained inverse kinematics improves lower limb joint angle reliability for certain tasks and joints.


Assuntos
Articulação do Quadril , Humanos , Masculino , Feminino , Adulto , Fenômenos Biomecânicos , Reprodutibilidade dos Testes , Articulação do Quadril/fisiologia , Articulação do Joelho/fisiologia , Amplitude de Movimento Articular/fisiologia , Extremidade Inferior/fisiologia , Modelos Biológicos , Movimento/fisiologia , Adulto Jovem
7.
Eur J Sport Sci ; 24(6): 750-757, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38874996

RESUMO

The purpose of this study was to clarify the temporal coordination between gaze, head, and arm movements during forehand rallies in table tennis. Collegiate male table tennis players (n = 7) conducted forehand rallies at a constant tempo (100, 120, and 150 bpm) using a metronome. In each tempo condition, participants performed 30 strokes (a total of 90 strokes). Gaze, head, and dominant arm (shoulder, elbow, and wrist) movements were recorded with an eye-tracking device equipped with a Gyro sensor and a 3-D motion capture system. The results showed that the effect of head movements relative to gaze movements was significantly higher than that of eye movements in the three tempo conditions. Our results indicate that head movements are closely associated with gaze movements during rallies. Furthermore, cross-correlation coefficients (CCs) between head and arm movements were more than 0.96 (maximum coefficient: 0.99). In addition, head and arm movements were synchronized during rallies. Finally, CCs between gaze and arm movements were more than 0.74 (maximum coefficient: 0.99), indicating that gaze movements are temporally coordinated with arm movements. Taken together, head movements could play important roles not only in gaze tracking but also in the temporal coordination with arm movements during table tennis forehand rallies.


Assuntos
Braço , Movimentos Oculares , Movimentos da Cabeça , Movimento , Desempenho Psicomotor , Tênis , Humanos , Masculino , Braço/fisiologia , Adulto Jovem , Movimentos da Cabeça/fisiologia , Tênis/fisiologia , Desempenho Psicomotor/fisiologia , Movimentos Oculares/fisiologia , Movimento/fisiologia , Cabeça/fisiologia
8.
PLoS One ; 19(6): e0305328, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38870249

RESUMO

Standing up from a chair is a key daily life activity that is sensitive to functional limitations as we age and associated with falls, frailty, and institutional living. Predictive neuromusculoskeletal models can potentially shed light on the interconnectivity and interdependency of age-related changes in neuromuscular capacity, reinforcement schemes, sensory integration, and adaptation strategies during stand-up. Most stand-up movements transfer directly into walking (sit-to-walk). The aim of this study was to develop and validate a neuromusculoskeletal model with reflex-based muscle control that enables simulation of the sit-to-walk movement under various conditions (seat height, foot placement). We developed a planar sit-to-walk musculoskeletal model (11 degrees-of-freedom, 20 muscles) and neuromuscular controller, consisting of a two-phase stand-up controller and a reflex-based gait controller. The stand-up controller contains generic neural pathways of delayed proprioceptive feedback from muscle length, force, velocity, and upper-body orientation (vestibular feedback) and includes both monosynaptic an antagonistic feedback pathways. The control parameters where optimized using a shooting-based optimization method, based on a high-level optimization criterium. Simulations were compared to recorded kinematics, ground reaction forces, and muscle activation. The simulated kinematics resemble the measured kinematics and muscle activations. The adaptation strategies that resulted from alterations in seat height, are comparable to those observed in adults. The simulation framework and model are publicly available and allow to study age-related compensation strategies, including reduced muscular capacity, reduced neural capacity, external perturbations, and altered movement objectives.


Assuntos
Caminhada , Humanos , Caminhada/fisiologia , Fenômenos Biomecânicos , Movimento/fisiologia , Músculo Esquelético/fisiologia , Modelos Biológicos , Simulação por Computador , Marcha/fisiologia , Adaptação Fisiológica/fisiologia , Postura Sentada
9.
J Bodyw Mov Ther ; 39: 454-462, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876668

RESUMO

OBJECTIVES: Anterior cruciate ligament injury is one of the most serious ligamentous injuries. The purpose is to compare the impact of the ankle joint on the knee during landing between athletes with chronic instability and a control group (coper group) and to verify the effects of the kinetic chain from other joints. DESIGN: Prospective study. SETTING: High school basketball. PARTICIPANTS: Participants were 62 female high school basketball players who had participated in team sports for >6 months. MAIN OUTCOME MEASURES: Player joint angles, movements, and moments. RESULTS: The knee valgus moment was significantly higher in the chronic ankle instability group than in the coper group (20%-60% [p < 0.01]; 80%-100% [p < 0.05]) during landing motion. The knee valgus moment was also significantly higher during the change from the maximum knee joint flexion position to the maximum extension (p < 0.05). In addition, the landing motions of the chronic instability group may have utilized suboptimal compensatory motor strategy on the sagittal plane, depending heavily on the knee joint's abduction moment. CONCLUSIONS: Our findings indicate that the chronic ankle instability group uses a different landing strategy pattern than the coper group by changing the joint moment and joint angle during landing, which may increase the risk of anterior cruciate ligament injury.


Assuntos
Articulação do Tornozelo , Basquetebol , Instabilidade Articular , Articulação do Joelho , Humanos , Basquetebol/fisiologia , Instabilidade Articular/fisiopatologia , Feminino , Adolescente , Articulação do Tornozelo/fisiopatologia , Articulação do Tornozelo/fisiologia , Estudos Prospectivos , Fenômenos Biomecânicos/fisiologia , Articulação do Joelho/fisiopatologia , Articulação do Joelho/fisiologia , Lesões do Ligamento Cruzado Anterior/fisiopatologia , Amplitude de Movimento Articular/fisiologia , Movimento/fisiologia
10.
BMC Ecol Evol ; 24(1): 82, 2024 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-38872087

RESUMO

BACKGROUND: Tandem running is a recruitment method found in some species of ants where one ant follows another ant to reach a destination having maintained a physical contact with its antennae, throughout the journey. It is considered that the exchange of information regarding the destination among the nestmates happened during the process of tandem running. We examined the impact of restricting antennal movement on tandem running by using Diacamma indicum, a tandem-running ponerine ant by following 480 tandem runs across 9 treatment colonies and comparing it with 10 control relocating colonies. RESULT: Though all the 19 colonies relocated successfully, treatment colonies took significantly longer time to do so. Restricted antennal movement did not influence the ability to become tandem leaders, initiate tandem runs or the work organization significantly. However, antennae-restricted ants performed fewer tandem runs and took significantly longer time. Followers with single or both antennae-restriction performed significantly higher number of interruptions and the alignment between the leader and follower was impacted as antenna-restricted followers subtended a greater angle and walked more to the side of the leader as compared to the control followers. CONCLUSION: This study showed unhindered movement of the followers' antennae is important for tandem-running ants. In the next step, to gain a comprehensive understanding of this recruitment method, it is essential to individually delineate different sensory modalities.


Assuntos
Formigas , Antenas de Artrópodes , Animais , Formigas/fisiologia , Antenas de Artrópodes/fisiologia , Corrida/fisiologia , Movimento/fisiologia , Comportamento Social , Comportamento de Retorno ao Território Vital/fisiologia
11.
Med ; 5(6): 485-486, 2024 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-38878764

RESUMO

Brain-computer interface (BCI) systems enable the brain to control limb movement on the side with impaired nerve conduction, showing great potential for promoting functional recovery. Wang et al.1 demonstrated that BCI combined with functional electrical stimulation improved the motor function scores of stroke patients by conducting a multicenter RCT study.


Assuntos
Interfaces Cérebro-Computador , Reabilitação do Acidente Vascular Cerebral , Extremidade Superior , Humanos , Extremidade Superior/fisiopatologia , Reabilitação do Acidente Vascular Cerebral/métodos , Movimento/fisiologia , Acidente Vascular Cerebral/fisiopatologia , Recuperação de Função Fisiológica/fisiologia
12.
Artigo em Inglês | MEDLINE | ID: mdl-38837930

RESUMO

Motor imagery (MI) is a high-level cognitive process that has been widely applied to clinical rehabilitation and brain-computer interfaces (BCIs). However, the decoding of MI tasks still faces challenges, and the neural mechanisms underlying its application are unclear, which seriously hinders the development of MI-based clinical applications and BCIs. Here, we combined EEG source reconstruction and Bayesian nonnegative matrix factorization (NMF) methods to construct large-scale cortical networks of left-hand and right-hand MI tasks. Compared to right-hand MI, the results showed that the significantly increased functional network connectivities (FNCs) mainly located among the visual network (VN), sensorimotor network (SMN), right temporal network, right central executive network, and right parietal network in the left-hand MI at the ß (13-30Hz) and all (8-30Hz) frequency bands. For the network properties analysis, we found that the clustering coefficient, global efficiency, and local efficiency were significantly increased and characteristic path length was significantly decreased in left-hand MI compared to right-hand MI at the ß and all frequency bands. These network pattern differences indicated that the left-hand MI may need more modulation of multiple large-scale networks (i.e., VN and SMN) mainly located in the right hemisphere. Finally, based on the spatial pattern network of FNC and network properties, we propose a classification model. The proposed model achieves a top classification accuracy of 78.2% in cross-subject two-class MI-BCI tasks. Overall, our findings provide new insights into the neural mechanisms of MI and a potential network biomarker to identify MI-BCI tasks.


Assuntos
Algoritmos , Teorema de Bayes , Interfaces Cérebro-Computador , Eletroencefalografia , Imaginação , Rede Nervosa , Humanos , Masculino , Imaginação/fisiologia , Eletroencefalografia/métodos , Adulto Jovem , Adulto , Feminino , Rede Nervosa/fisiologia , Mãos/fisiologia , Córtex Cerebral/fisiologia , Lateralidade Funcional/fisiologia , Movimento/fisiologia
13.
J Neural Eng ; 21(3)2024 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-38834056

RESUMO

Objective. Electroencephalography (EEG)-based motor imagery (MI) is a promising paradigm for brain-computer interface (BCI), but the non-stationarity and low signal-to-noise ratio of EEG signals make it a challenging task.Approach. To achieve high-precision MI classification, we propose a Diagonal Masking Self-Attention-based Multi-Scale Network (DMSA-MSNet) to fully develop, extract, and emphasize features from different scales. First, for local features, a multi-scale temporal-spatial block is proposed to extract features from different receptive fields. Second, an adaptive branch fusion block is specifically designed to bridge the semantic gap between these coded features from different scales. Finally, in order to analyze global information over long ranges, a diagonal masking self-attention block is introduced, which highlights the most valuable features in the data.Main results. The proposed DMSA-MSNet outperforms state-of-the-art models on the BCI Competition IV 2a and the BCI Competition IV 2b datasets.Significance. Our study achieves rich information extraction from EEG signals and provides an effective solution for MI classification.


Assuntos
Interfaces Cérebro-Computador , Eletroencefalografia , Imaginação , Eletroencefalografia/métodos , Eletroencefalografia/classificação , Imaginação/fisiologia , Humanos , Redes Neurais de Computação , Movimento/fisiologia
14.
PLoS One ; 19(5): e0301608, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38691555

RESUMO

The application of pattern mining algorithms to extract movement patterns from sports big data can improve training specificity by facilitating a more granular evaluation of movement. Since movement patterns can only occur as consecutive, non-consecutive, or non-sequential, this study aimed to identify the best set of movement patterns for player movement profiling in professional rugby league and quantify the similarity among distinct movement patterns. Three pattern mining algorithms (l-length Closed Contiguous [LCCspm], Longest Common Subsequence [LCS] and AprioriClose) were used to extract patterns to profile elite rugby football league hookers (n = 22 players) and wingers (n = 28 players) match-games movements across 319 matches. Jaccard similarity score was used to quantify the similarity between algorithms' movement patterns and machine learning classification modelling identified the best algorithm's movement patterns to separate playing positions. LCCspm and LCS movement patterns shared a 0.19 Jaccard similarity score. AprioriClose movement patterns shared no significant Jaccard similarity with LCCspm (0.008) and LCS (0.009) patterns. The closed contiguous movement patterns profiled by LCCspm best-separated players into playing positions. Multi-layered Perceptron classification algorithm achieved the highest accuracy of 91.02% and precision, recall and F1 scores of 0.91 respectively. Therefore, we recommend the extraction of closed contiguous (consecutive) over non-consecutive and non-sequential movement patterns for separating groups of players.


Assuntos
Algoritmos , Futebol Americano , Movimento , Humanos , Futebol Americano/fisiologia , Movimento/fisiologia , Desempenho Atlético/fisiologia , Masculino , Aprendizado de Máquina , Atletas , Mineração de Dados/métodos , Adulto , Rugby
15.
Sci Rep ; 14(1): 9996, 2024 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-38693184

RESUMO

Tracking a moving object with the eyes seems like a simple task but involves areas of prefrontal cortex (PFC) associated with attention, working memory and prediction. Increasing the demand on these processes with secondary tasks can affect eye movements and/or perceptual judgments. This is particularly evident in chronic or acute neurological conditions such as Alzheimer's disease or mild traumatic brain injury. Here, we combined near infrared spectroscopy and video-oculography to examine the effects of concurrent upper limb movement, which provides additional afference and efference that facilitates tracking of a moving object, in a novel dual-task pursuit protocol. We confirmed the expected effects on judgement accuracy in the primary and secondary tasks, as well as a reduction in eye velocity when the moving object was occluded. Although there was limited evidence of oculo-manual facilitation on behavioural measures, performing concurrent upper limb movement did result in lower activity in left medial PFC, as well as a change in PFC network organisation, which was shown by Graph analysis to be locally and globally more efficient. These findings extend upon previous work by showing how PFC is functionally organised to support eye-hand coordination when task demands more closely replicate daily activities.


Assuntos
Córtex Pré-Frontal , Extremidade Superior , Humanos , Córtex Pré-Frontal/fisiologia , Masculino , Feminino , Extremidade Superior/fisiologia , Adulto , Adulto Jovem , Movimento/fisiologia , Desempenho Psicomotor/fisiologia , Movimentos Oculares/fisiologia , Espectroscopia de Luz Próxima ao Infravermelho , Atenção/fisiologia
16.
J Bodyw Mov Ther ; 38: 197-204, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38763563

RESUMO

BACKGROUND: Functional Movement Screen (FMS) is an important tool in the assessment of exercise practice. Assuming FMS lacks precise validity for assessing postural deficits, further research is needed to assess whether it is a sufficiently precise tool for analysing joint mobility. Research aims were to evaluate: convergent validity of Deep Squat (DS) - one of FMS tests - regarding joint mobility, using data from a three-dimensional motion analysis as a comparable method; DS's ability to discriminate between subjects with different joint mobility levels. METHODS: Sixty subjects were selected (23.6 ± 3.8 years). DS was performed according to FMS guidelines. Subjects' performance in frontal and sagittal planes was recorded by two video cameras and subsequently scored by two FMS-certified evaluators. Three-dimensional motion analyses of DS were acquired by a Vicon Motion Capture System (200 Hz). Ten trials were acquired for each subject. Ankle, knee, hip, and shoulder angular positions in sagittal plane were determined from the FullBody PlugInGait model. Spearman's coefficient examined the correlation between angular positions and DS score. Kruskal-Wallis test was used to assess the DS ability to discriminate between subjects with different joint mobility levels by comparing different scores. RESULTS: Negligible to moderate correlations were found between DS score and angular positions (-0.5 < r < 0.5). Only shoulder angular positions showed differences between score "1" and "2" (p < 0.05). Shoulder and hip angular positions showed no differences between score "2" and "3" (p < 0.05). CONCLUSIONS: DS yielded low convergent validity regarding joint mobility and did not show the ability to discriminate between subjects with different joint mobility levels.


Assuntos
Amplitude de Movimento Articular , Humanos , Masculino , Feminino , Adulto , Amplitude de Movimento Articular/fisiologia , Adulto Jovem , Reprodutibilidade dos Testes , Teste de Esforço/métodos , Teste de Esforço/normas , Articulação do Tornozelo/fisiologia , Articulação do Joelho/fisiologia , Fenômenos Biomecânicos/fisiologia , Articulação do Quadril/fisiologia , Movimento/fisiologia , Articulação do Ombro/fisiologia , Articulação do Ombro/fisiopatologia
17.
J Bodyw Mov Ther ; 38: 323-328, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38763576

RESUMO

BACKGROUND: Movement System Impairment (MSI) classification and treatment effectively diagnose and treat the individual with neck pain. There is a lacuna in the current neck pain management guidelines addressing movement-specific mechanical diagnosis. MSI is based on the movement-specific mechanical diagnosis and kinesiopathologic model. PURPOSE: The present study aimed to investigate the effectiveness of the movement system impairment model among neck pain individuals. METHODS: This study was designed as a randomized controlled trial. Eighty-two participants were screened for eligibility; Sixty individuals fulfilling the inclusion criteria were randomized into the experimental group (n = 30) and control group (n = 30). A total of 52 individuals completed the study, 26 in both groups. The experimental and the control group received treatment as recommended by the MSI model and clinical practice guideline (CPG) for neck pain with mobility deficits. All participants were assessed for pain intensity, cervical range of motion, deep cervical muscle strength, endurance, and disability at baseline and the end of 3rd week of treatment. RESULTS: Significant differences were found in pain intensity, cervical range of motion, cervical muscle strength, endurance, and disability with both groups at the end of 10 sessions of treatment spread over three weeks (p < 0.05). However, the experimental group (MSI) demonstrated more clinical benefits than CPG based neck mobility deficits treatment. CONCLUSION: The movement system impairment model may effectively diagnose and treat neck pain in individuals with mobility deficits. Future research is warranted to establish its long-term effect.


Assuntos
Força Muscular , Cervicalgia , Amplitude de Movimento Articular , Humanos , Cervicalgia/terapia , Cervicalgia/fisiopatologia , Cervicalgia/diagnóstico , Feminino , Amplitude de Movimento Articular/fisiologia , Masculino , Adulto , Força Muscular/fisiologia , Pessoa de Meia-Idade , Medição da Dor/métodos , Músculos do Pescoço/fisiopatologia , Modalidades de Fisioterapia , Movimento/fisiologia
18.
J Bodyw Mov Ther ; 38: 346-349, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38763579

RESUMO

INTRODUCTION: Functional Movement Screening (FMS) is a battery used for injury prediction, identifying asymmetry and weak connections in basic functional movement patterns. The muscles assessed in FMS are also respiratory muscles. Therefore, FMS scores were thought to be related to respiratory muscle strength. The aim of our study was to examine the relationship between Functional Movement Screen and respiratory muscles strength in professional football players and sedentary individuals. METHODS: The study included 23 male professional football players (mean age: 25 ± 6.22 years) and 22 sedantery healthy volunteers (mean age: 24.54 ± 2.75 years). Functional Movement Screen tests were applied by the certified researcher. Respiratory muscle strength measurement were measured with an additional mouth apparatus attached to the portable spirometer 'Pony FX Desktop Spirometry' device. RESULTS: Trunk stability push-up (p = 0.01; r = 0.490), rotational stability (p = 0.025; r = 0,519), and Functional Movement Screen total score (p = 0.02; r = 0.568) with maximum expiratory pressure were moderately positive correlated in professional football players. In the sedantery group, Functional Movement Screen sub-parameters were not correlated respiratory muscle strength (p > 0.05). DISCUSSION: The higher Functional Movement Screen total score in professional football players and their skills in functional movements that require trunk and core stabilization increase expiratory muscle strength were found compared to sedentary individuals. CONCLUSION: Increase of expiratory muscle strength may be useful in the treatment program when the aim was to Improving functional movement patterns, trunk and core stabilization.


Assuntos
Força Muscular , Músculos Respiratórios , Comportamento Sedentário , Futebol , Humanos , Masculino , Força Muscular/fisiologia , Músculos Respiratórios/fisiologia , Adulto , Adulto Jovem , Futebol/fisiologia , Movimento/fisiologia
19.
J Bodyw Mov Ther ; 38: 464-473, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38763594

RESUMO

BACKGROUND: Persons on the autism spectrum exhibit poorer body awareness than neurotypical persons. Since movement quality may be regarded as an expression of body awareness, assessment of movement quality is important. Sound assessments of measurement properties are essential if reliable decisions about body awareness interventions for persons on the autism spectrum are to be made, but there is insufficient research. OBJECTIVE: To assess measurement properties of the Body Awareness Scale Movement Quality (BAS MQ) in an autism and a neurotypical reference group. METHODS: Persons on the autism spectrum (n=108) and neurotypical references (n=32) were included. All were assessed with BAS MQ. Data were analyzed according to the Rasch model. RESULTS: BAS MQ was found to have acceptable unidimensionality, supported by the fit statistics. The hierarchical ordering showed that coordination ability was the most difficult, followed by stability and relating. Response category functioning worked as intended for 19 out of 23 items. There were few difficult items, which decreased targeting. Reliability measures were good. BAS MQ discriminated between the autism and the reference groups, with the autism group exhibiting poorer movement quality, reflecting clinical observations and previous research. CONCLUSIONS: BAS MQ was found to have acceptable measurement properties, though suffering from problems with targeting item difficulty to person ability for persons on the autism spectrum. The BAS MQ may, along with experienced movement quality, contribute to clinically relevant information of persons on the autism spectrum, although we encourage refinements and further analyses to improve its measurement properties.


Assuntos
Transtorno do Espectro Autista , Conscientização , Movimento , Humanos , Feminino , Masculino , Transtorno do Espectro Autista/fisiopatologia , Adulto , Movimento/fisiologia , Conscientização/fisiologia , Reprodutibilidade dos Testes , Adulto Jovem , Adolescente , Psicometria/normas , Pessoa de Meia-Idade , Imagem Corporal/psicologia
20.
Sensors (Basel) ; 24(9)2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38732811

RESUMO

Rotational jumps are crucial techniques in sports competitions. Estimating ground reaction forces (GRFs), a constituting component of jumps, through a biomechanical model-based approach allows for analysis, even in environments where force plates or machine learning training data would be impossible. In this study, rotational jump movements involving twists on land were measured using inertial measurement units (IMUs), and GRFs and body loads were estimated using a 3D forward dynamics model. Our forward dynamics and optimization calculation-based estimation method generated and optimized body movements using cost functions defined by motion measurements and internal body loads. To reduce the influence of dynamic acceleration in the optimization calculation, we estimated the 3D orientation using sensor fusion, comprising acceleration and angular velocity data from IMUs and an extended Kalman filter. As a result, by generating cost function-based movements, we could calculate biomechanically valid GRFs while following the measured movements, even if not all joints were covered by IMUs. The estimation approach we developed in this study allows for measurement condition- or training data-independent 3D motion analysis.


Assuntos
Movimento , Esportes , Humanos , Movimento/fisiologia , Fenômenos Biomecânicos/fisiologia , Esportes/fisiologia , Aceleração , Masculino , Adulto , Algoritmos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...