Progression of partial to complete ruptures of the Achilles tendon during rehabilitation: A study using a finite element model.

Substantial research on complete Achilles tendon ruptures is available, but guidance on partial ruptures is comparatively sparse. Conservative management is considered acceptable in partial tendon ruptures affecting less than 50% of the tendon's width, but supporting experimental evidence is currently lacking. Using a previously validated finite element model of the Achilles tendon, this study aimed to assess whether loading conditions simulating an early functional rehabilitation protocol could elicit progression to a complete rupture in partial ruptures of varying severity. In silico tendon rupture simulations were performed to locate the most likely rupture site for least, moderate, and extreme subtendon twist configurations. These three models were split at the corresponding rupture site and two sets of partial ruptures were created for each, starting from the medial and lateral sides, and ranging from 10% to 50% loss of continuity. Simulations were conducted with material parameters from healthy and tendinopathic tendons. Partial ruptures were considered to progress if the volume of elements showing a maximum principal strain above 10% exceeded 3 mm3 . To assess whether the tendinopathic tendons typical geometric characteristics could compensate for the inferior material properties found in tendinopathy, an additional model with increased cross-sectional area in the free tendon region was developed. Progression to complete ruptures occurred even with less than a 50% loss of continuity, regardless of subtendon twisting, and material parameters. The tendinopathic tendon model with increased cross-sectional area showed similar results. These findings suggest the current criteria for surgical treatment of partial ruptures should be reconsidered. Statement of clinical significance: The clinical significance and most appropriate treatment of partial ruptures of the Achilles tendon is unclear. Despite the widespread use of the "50% rule" in treatment decisions of partial tendon ruptures, experimental evidence supporting it is missing. The present study provides new data, from a validated aponeurotic and free Achilles tendon finite element model, showing that partial ruptures may progress to complete ruptures under loading conditions elicited from functional rehabilitation protocols, even for partial ruptures affecting less than 50% of the tendon's width. Under these novel findings, the current criteria for surgical treatment of partial ruptures should be reconsidered.

Game-based learning enhances students' understanding of endocrine physiology in veterinary medicine.

Endocrine physiology is a complex subject for students. Game-based learning (GBL) and case-based learning (CBL) are active methodologies that are widely used because of their potential for motivation and greater proximity to the reality of modern students. We evaluated the effectiveness of GBL and CBL among veterinary medicine students compared with a control group using peer tutoring. Students (n = 106) from two institutions volunteered to participate in this study. The participants were submitted to a pretest questionnaire and subsequently were divided into three paired groups by their performance on the pretest exam: 1) traditional class + peer tutoring, 2) traditional class + GBL, and 3) traditional class + CBL. After the students completed the activities, their performance was once again evaluated by applying a new test with the same initial 10 questions and another set of 10 different questions. The students' perceptions and satisfaction with the methodologies and learning strategies were assessed. Anxiety was assessed with the State-Trait Anxiety Inventory before and after the conventional class and after the active methodologies. The GBL group significantly improved their correct answers compared with the baseline (P < 0.05), with no significant difference from CBL and peer tutoring. Anxiety levels did not differ regardless of the time of evaluation or the teaching methodology applied. GBL promoted a greater perception of the stimulus for self-study and problem-solving ability and contributed to the development of group dynamics compared with the group who received CBL (P < 0.05). In conclusion, GBL showed better results than peer tutoring and CBL.NEW & NOTEWORTHY We compared the supplementary use of game-based learning, case-based learning, and peer tutoring in the study of endocrine physiology by veterinary students and observed a slight advantage for game-based learning over the other two methodologies. The game was developed by the authors and is an unprecedented tool that can prove useful to improve knowledge acquisition in students of veterinary medicine. Thus, game-based learning is an effective supplementary teaching strategy.

Gingival metastasis of angiosarcoma of the breast as a first manifestation of spreading disease: Case report and review of the literature.

BACKGROUND: Angiosarcoma is an aggressive malignant neoplasm of vascular origin. Oral metastases of angiosarcoma are rare and have a non-specific clinical presentation, thus the diagnosis may be challenging. CASE REPORT: Herein we report a case of a 34-year-old female patient after treatment of a high-grade angiosarcoma of the breast, who presented an asymptomatic bleeding purplish nodule in the maxillary interdental papilla between the first and second premolar. A biopsy was performed, and the histological examination revealed infiltration by malignant neoplasm of epithelioid and fusocellular pattern. Immunohistochemical analysis demonstrated that neoplastic cells were positive for ERG and CD31, and negative for cytokeratins AE1/AE3, confirming the diagnosis of metastatic angiosarcoma. After investigation, multiple metastases were discovered. The patient is under management with chemotherapy and palliative radiotherapy for the bone lesions. CONCLUSION: Metastases should be considered in the differential diagnosis of oral lesions in patients with a previous history of cancer. Due to the morphology of angiosarcomas, the metastatic lesions may resemble benign vascular lesions, therefore, biopsy is mandatory to exclude malignancy.

3D printing technology to produce intraoral stents for head and neck radiotherapy: A scoping review.

INTRODUCTION: Radiotherapy remains one of the main treatments for head and neck cancer; however, it is accompanied by acute and chronic adverse effects. Use of three-dimensional (3D) oral stents to modulate radiation intensity to specific target areas have been developed to minimize these adverse effects. This study aimed to present a scoping review of studies published on 3D printing of oral stents and their clinical applicability. METHODS: MEDLINE/Pubmed, Scopus, Web of Science and CENTRAL Cochrane data bases were searched, studies selected, and data collected by three independent reviewers up to December 2022. The review was conducted based on the Preferred Reporting Items for Systematic Reviews and Meta-analysis-Extension for Scoping Reviews (PRISMA-ScR). RESULTS: The search resulted in 404 studies and 5 articles fulfilled the eligibility criteria and were considered for this review. Three-dimensional printed intraoral stents were produced for 56 patients with indication for radiotherapy. 3D-printed stents were well-tolerated by all tested patients and demonstrated great reproducibility of maxillomandibular relation, required less time for production and lower cost to manufacture. Two studies showed great protection of healthy tissues with 3D-printed stents during radiotherapy. CONCLUSIONS: Three-dimensional printing is promising for production of intraoral stents, however, more studies are needed to improve the technique and further investigate the safety and prevention of oral toxicities from radiotherapy.

Gingival cyst of the adult.

The gingival cyst of the adult (GCA) is a rare odontogenic cyst, consisting of 0.3% of all odontogenic cysts. This case report, based on CARE guidelines for case reports, aims to present a case of a 52-year-old female patient with a symptomatic translucent nodule in the upper left anterior gingiva, measuring approximately 6mm. Excisional biopsy was performed, and the histological examination revealed multiple cystic cavities lined by the squamous epithelium of varying thickness with focal areas of nodular thickenings. The presence of clusters of cells with clear cytoplasm within epithelial thickenings was observed. PAS staining was negative in clear cells. The diagnosis of the GCA was established. Despite its rarity, GCA should be considered in the differential diagnosis of gingival lesions. Conservative surgical treatment proved to be effective, with no signs of recurrence.

Effectiveness of an Internet-Based Self-Guided Program to Treat Depression in a Sample of Brazilian Users: Randomized Controlled Trial.

BACKGROUND: Depression is undertreated in Brazil. Deprexis is a self-guided internet-based program used to treat depressive symptoms based on empirically supported integrative and cognitive behavioral therapy. Evidence from a meta-analysis supports Deprexis' efficacy in German-speaking countries and the United States, but no study has been conducted using this program in countries with low literacy rates and large social disparities. Furthermore, few studies have investigated whether internet-based interventions ameliorate the psychological processes that might underlie depressive symptomatology, such as low perceived self-efficacy. OBJECTIVE: The main objective of this study was to replicate in Brazil previously reported effects of Deprexis on depressive symptom reduction. Therefore, the main research question was whether Deprexis is effective in reducing depressive symptoms and the general psychological state in Brazilian users with moderate and severe depression in comparison with a control group that does not receive access to Deprexis. A secondary research question was whether the use of Deprexis affects perceptions of self-efficacy. METHODS: We interviewed 312 participants recruited over the internet and randomized 189 participants with moderate to severe depression (according to the Patient Health Questionnaire-9 and a semistructured interview) to an intervention condition (treatment as usual plus immediate access to Deprexis for 90 days, n=94) or to a control condition (treatment as usual and delayed access to Deprexis, after 8 weeks, n=95). RESULTS: Participants from the immediate access group logged in at Deprexis an average of 14.81 (SD 12.16) times. The intention-to-treat analysis using a linear mixed model showed that participants who received Deprexis improved significantly more than participants assigned to the delayed access control group on the primary depression self-assessment measure (Patient Health Questionnaire-9; Cohen d=0.80; P<.001) and secondary outcomes, such as general psychological state measure (Clinical Outcome in Routine Evaluation-Outcome Measurement; Cohen d=0.82; P<.001) and the perceived self-efficacy measure (Cohen d=0.63; P<.001). The intention-to-treat analyses showed that 21% (20/94) of the participants achieved remission compared with 7% (7/95) in the control group (P<.001). The deterioration rates were lower in the immediate access control group. The dropout rate was high, but no differences in demographic and clinical variables were found. Participants reported a medium to high level of satisfaction with Deprexis. CONCLUSIONS: These results replicate previous findings by showing that Deprexis can facilitate symptomatic improvement over 3 months in depressed samples of Brazilian users. From a public health perspective, this is important information to expand the reach of internet-based interventions for those who really need them, especially in countries with less access to mental health care. This extends previous research by showing significant effects on perceived self-efficacy. TRIAL REGISTRATION: Registro Brasileiro de Ensaios Clíncos (ReBec) RBR-6kk3bx UTN U1111-1212-8998; https://ensaiosclinicos.gov.br/rg/RBR-6kk3bx/. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): RR2-10.1590/1516-4446-2019-0582.

Maldi-Tof-Ms Identified Rhodococcus Hoagie Bacteraemia In An Immunocompromised Patient.

Rhodococcus hoagie, previously referred to as R. equi, is a Gram-positive intracellular coccobacillus that belongs to the Nocardiaceae family. This multi-host pathogen causes infections in farm animals, particularly foals, but also in immunosuppressed patients, mainly individuals treated with high doses of corticosteroids, subjected to organ transplant, or infected with human immunodeficiency virus Objectives of the study are to report a bloodstream infection in an immunocompromised patient. Immunocompromised patients with advanced HIV who presented bloodstream infection, residing in an urban setting and having undertaken no trips to the countryside or elsewhere during the COVID-19 pandemic. Blood culture by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) was done in order to identify the bacteria. The immunocompromised female patient presented bloodstream infection by Rhodococcus hoagie, which was identified using MALDI-TOF-MS. R. hoagie can cause a severe infection with a high mortality rate if prompt treatment with a combination of antibiotics is not established. A high level of suspicion is required to establish the diagnosis, as it may be misdiagnosed as pulmonary tuberculosis. On gram stain, R. hoagie may appear as beaded to solid staining coccobacilli, which can be dismissed as a "diphtheroid" contaminant. The infection was identified using MALDI-TOF-MS.

Gingival cyst of the adult

ABSTRACT The gingival cyst of the adult (GCA) is a rare odontogenic cyst, consisting of 0.3% of all odontogenic cysts. This case report, based on CARE guidelines for case reports, aims to present a case of a 52-year-old female patient with a symptomatic translucent nodule in the upper left anterior gingiva, measuring approximately 6mm. Excisional biopsy was performed, and the histological examination revealed multiple cystic cavities lined by the squamous epithelium of varying thickness with focal areas of nodular thickenings. The presence of clusters of cells with clear cytoplasm within epithelial thickenings was observed. PAS staining was negative in clear cells. The diagnosis of the GCA was established. Despite its rarity, GCA should be considered in the differential diagnosis of gingival lesions. Conservative surgical treatment proved to be effective, with no signs of recurrence.

Viver com hiv/aids em situação de rua: representações sociais de pessoas hospitalizadas / Vivir con vih/sida en la calle: representaciones sociales de personas hospitalizadas / Living with hiv/aids in street situation: social representations of hospitalized people

Objetivos: apreender as representações sociais sobre o viver com HIV para pessoas hospitalizadas em situação de rua e identificar os conteúdos, elementos e estrutura dessas representações. Método: trata-se de estudo descritivo, embasado na Teoria das Representações Sociais, realizado com pessoas hospitalizadas, que vivem com HIV em situação de rua. Para coleta de dados utilizou-se um formulário e o Teste de Associação Livre de Palavras. A análise de dados ocorreu por meio da estatística descritiva e do software EVOC. Resultados: dos 65 participantes, 46 eram do sexo masculino, com idade média de 39 anos. Observou-se como núcleo central das representações sociais: medo, doente e preconceito, indicando as proporções funcionais e relacionadas à imagem do objeto investigado. O grupo investigado representou o viver com HIV/aids na rua por meio de palavras negativas, carregadas de mágoa, tristeza e medo. Conclusão: as representações têm um provável núcleo central na palavra "medo".

Objetivos: aprehender las representaciones sociales sobre el vivir con VIH para personas hospitalizadas en situación de calle e identificar los contenidos, elementos y estructura de esas representaciones. Método: se trata de estudio descriptivo, basado en la Teoría de las Representaciones Sociales, realizado con personas hospitalizadas, que viven con VIH en situación de calle. Para recolección de datos se utilizó un formulario y el Test de Asociación Libre de Palabras. El análisis de datos se realizó por medio de la estadística descriptiva y del software EVOC. Resultados: de los 65 participantes, 46 eran hombres, con edad media de 39 años. Se observó como núcleo central de las representaciones sociales: miedo, enfermo y prejuicio, indicando las proporciones funcionales y relacionadas a la imagen del objeto investigado. El grupo investigado representó el vivir con VIH/sida en la calle por medio de palabras negativas, cargadas de dolor, tristeza y miedo. Conclusión: las representaciones tienen un probable núcleo central en la palabra "miedo".

Objective: to apprehend the social representations about living with HIV for homeless people hospitalized and to identify the contents, elements and structure of these representations. Method: this is a descriptive study, based on the Theory of Social Representations, conducted with homeless hospitalized people living with HIV. For data collection, a form and the Free Word Association Test were used. Data analysis occurred through descriptive statistics and EVOC software. Results: of the 65 participants, 46 were male, with a mean age of 39 years. The central core of social representations included: fear, illness and prejudice, indicating the functional proportions and related to the image of the investigated object. The investigated group represented living with HIV/aids on the street through negative words, loaded with hurt, sadness and fear. Conclusion: representations have a probable core in the word "fear".

High-dimensional intravital microscopy reveals major changes in splenic immune system during postnatal development.

Spleen is a key organ for immunologic surveillance, acting as a firewall for antigens and parasites that spread through the blood. However, how spleen leukocytes evolve across the developmental phase, and how they spatially organize and interact in vivo is still poorly understood. Using a novel combination of selected antibodies and fluorophores to image in vivo the spleen immune environment, we described for the first time the dynamics of immune development across postnatal period. We found that spleens from adults and infants had similar numbers and arrangement of lymphoid cells. In contrast, splenic immune environment in newborns is sharply different from adults in almost all parameters analysed. Using this in vivo approach, B cells were the most frequent subtype throughout the development. Also, we revealed how infections - using a model of malaria - can change the spleen immune profile in adults and infants, which could become the key to understanding different severity grades of infection. Our new imaging solutions can be extremely useful for different groups in all areas of biological investigation, paving a way for new intravital approaches and advances.

Propriedades psicométricas da versão brasileira do Questionário de Ambivalência em Psicoterapia - QAP / Psychometric properties of the brazilian version of the Ambivalence in Psychotherapy Questionnaire (APQ) / Propiedades psicométricas de la versión brasileña del Cuestionario de Ambivalencia en Psicoterapia - QAP

Níveis elevados de ambivalência estão associados a piores resultados e abandono terapêutico. Este estudo teve como objetivo a adaptação transcultural e avaliação das propriedades psicométricas do Questionário de Ambivalência em Psicoterapia (QAP). Após adaptação cultural do instrumento, foram avaliados 181 indivíduos em psicoterapia de diversas abordagens, em clínicas-escola e consultórios particulares. O QAP foi avaliado quanto à estrutura interna e relação com variáveis externas. Na análise fatorial confirmatória, o modelo com melhor ajuste foi composto por três dimensões: duas de primeira ordem - Desmoralização e Alternância - e uma de segunda ordem - Ambivalência. A consistência interna foi 0,86. Na relação com variáveis externas, o QAP se correlacionou moderadamente com medidas de desconforto psicológico (OQ-45- Outcome Questionnaire) (r = 0,65) e motivação para mudança (URICA - University of Rhode Island Change Assessment): contemplação (r = 0,36) e manutenção (r = 0,37). A versão brasileira do QAP demonstrou ser um instrumento com boas características psicométricas, de aplicação rápida e fácil. (AU)

High levels of ambivalence are associated with poor outcomes and therapeutic abandonment. The objective of this study was to conduct a cross-cultural adaptation and assessment of the psychometric properties of the Ambivalence in Psychotherapy Questionnaire (APQ). After cultural adaptation of the instrument, we assessed 181 individuals undergoing psychotherapy of different approaches in school clinics and private practices. The APQ was validated regarding internal structure and relationship with external variables. In the confirmatory factor analysis, the model with the best fit was composed of three dimensions: two first-order - Demoralization and Wavering - and one second-order - Ambivalence. The internal consistency was 0.86. In relation to external variables, the APQ correlated moderately with measures of psychological distress (OQ-45- Outcome Questionnaire) (r = 0.65) and motivation to change (URICA- University of Rhode Island Change Assessment): contemplation (r = 0.36) and maintenance (r = 0.37). The results indicated that the Brazilian version of the APQ is a suitable instrument, of quick and easy application. (AU)

Los altos niveles de ambivalencia se asocian con peores resultados y abandono terapéutico. Este estudio tuvo como objetivo la adaptación transcultural y la evaluación de las propiedades psicométricas del Cuestionario de Ambivalencia en Psicoterapia (QAP). Después de la adaptación cultural del instrumento, 181 individuos fueron evaluados en psicoterapia utilizando diferentes enfoques, en clínicas-escuelas y consultorios privados. El QAP fue evaluado por su estructura interna y su relación con variables externas. En el análisis factorial confirmatorio, el modelo con mejor ajuste estuvo compuesto por tres dimensiones: dos de primer orden - Desmoralización y Alternancia - y una de segundo orden - Ambivalencia. La consistencia interna fue de 0,86. En relación con las variables externas, el QAP se correlacionó moderadamente con las medidas de malestar psicológico (OQ-45- Outcome Questionnaire) (r = 0,65) y motivación para el cambio (URICA- University of Rhode Island Change Assessment): contemplación (r = 0,36) y mantenimiento (r = 0,37). La versión brasileña del QAP demostró ser un instrumento con buenas características psicométricas, de rápida y fácil aplicación. (AU)

Biomass and vegetation index by remote sensing in different caatinga forest areas / Relação entre biomassa e índices de vegetação por sensoriamento remoto em diferentes áreas de florestas de caatinga

Continued unsustainable exploitation of natural resources promotes environmental degradation and threatens the preservation of dry forests around the world. This situation exposes the fragility and the necessity to study landscape transformations. In addition, it is necessary to consider the biomass quantity and to establish strategies to monitor natural and anthropic disturbances. Thus, this research analyzed the relationship between vegetation index and the estimated biomass using allometric equations in different Brazilian caatinga forest areas from satellite images. This procedure is performed by estimating the biomass from 9 dry tropical forest fragments using allometric equations. Area delimitations were obtained from the Embrapa collection of dendrometric data collected in the period between 2011 and 2012. Spectral variables were obtained from the orthorectified images of the RapidEye satellite. The aboveground biomass ranged from 6.88 to 123.82 Mg.ha-1. SAVI values were L = 1 and L = 0.5, while NDVI and EVI ranged from 0.1835 to 0.4294, 0.2197 to 0.5019, 0.3622 to 0.7584, and 0.0987 to 0.3169, respectively. Relationships among the estimated biomass and the vegetation indexes were moderate, with correlation coefficients (Rs) varying between 0.64 and 0.58. The best adjusted equation was the SAVI equation, for which the coefficient of determination was R² = 0.50, R2aj = 0.49, RMSE = 17.18 Mg.ha-1 and mean absolute error of prediction (MAE) = 14.07 Mg.ha-1, confirming the importance of the Savi index in estimating the caatinga aboveground biomass.

A exploração contínua e insustentável dos recursos naturais promove a degradação ambiental e ameaça a conservação das florestas secas no mundo. Essa situação expõe a fragilidade e a necessidade de estudar as transformações da paisagem. É necessário considerar o quantitativo de biomassa e o estabelecimento de estratégias para monitorar distúrbios naturais e antrópicos. Assim, este trabalho teve como objetivo analisar a relação entre o índice de vegetação e a biomassa estimada por meio de equações alométricas em diferentes áreas da caatinga brasileira a partir de imagens de satélite. Este procedimento é realizado estimando-se a biomassa de nove fragmentos de floresta tropical seca com o uso em equações alométricas. As delimitações das áreas foram obtidas da coleção da Empresa Brasileira de Pesquisa Agropecuária, a partir dos dados dendrométricos coletados no período entre 2011 e 2012. As variáveis espectrais foram obtidas a partir das imagens ortorretificadas do satélite RapidEye. A biomassa acima do solo variou de 6,88 a 123,82 Mg.ha-1. Os valores de SAVI para os coeficientes L = 1 e L = 0,5, NDVI e EVI variaram de 0,1835 a 0,4294, 0,2197 a 0,5019, 0,3622 a 0,7584 e 0,0987 a 0,3169, respectivamente. As relações entre a biomassa estimada e os índices de vegetação foram moderadas, com coeficiente de correlação (rs) variando entre 0,64 e 0,58. A equação mais bem ajustada foi a Equação do SAVI, com coeficiente de determinação foi R² = 0,50, R2aj = 0.49, RMSE = 17.18 Mg.ha-1 e erro médio absoluto de predição (MAE) = 14.07 Mg.ha-1, confirmando a importância do índice SAVI na estimativa da biomassa aérea da Caatinga.

Optimizing cognitive-behavioral therapy for social anxiety disorder and understanding the mechanisms of change: Study protocol for a randomized factorial trial.

BACKGROUND: Social anxiety disorder (SAD) is characterized by a marked fear of negative evaluation in social situations and significant impairments. Even with the most effective treatments, remission rates are around 50%. An important reason for the limited effectiveness of treatments is the lack of evidence-based explanation of how treatments work and what their active ingredients might be. An approach to unpack the active ingredients and mechanisms of treatment is the factorial design. OBJECTIVES: The study is a factorial trial aiming (1) to examine the main effects and interactions for the four main treatment components of internet-based cognitive-behavioral therapy (ICBT) for SAD (i.e., psychoeducation, cognitive restructuring, attentional training, and exposure) and (2) to examine whether and which change mechanisms mediate the relationship between treatment components and symptom reduction. METHODS: A total of 464 adults diagnosed with SAD will be randomized to one of 16 conditions containing combinations of the treatment components. The primary endpoint is SAD symptomatology at eight weeks. Secondary endpoints include symptoms of depression and anxiety, quality of life, and negative effects. Hypothesized change mechanisms are the increase of knowledge about SAD, the decrease of dysfunctional cognitions, the decrease of self-focused attention, and the decrease of avoidance and safety behaviors. DISCUSSION: A better understanding of the differential efficacy of treatment components and mechanisms of treatment underlying ICBT for SAD might inform clinicians and researchers to plan more potent and scalable treatments. TRIAL REGISTRATION: clinicaltrials.gov (NCT04879641) on June, 11th 2021. https://clinicaltrials.gov/ct2/show/NCT04879641.

A rare case of Ewing sarcoma metastasis to the oral cavity.

Ewing sarcoma in the head and neck is rare, and metastasis from other bones to the mandible accounts for 0.7% of cases. This report presents a case of oral metastasis in a 24-year-old male patient diagnosed with Ewing sarcoma of the femur (p53 gene mutation and EWSR1-ERG fusion). The chief complaint was numbness in the mandible and pain for 1 month and a hardened, ulcerated exophytic lesion in the right retromolar region. Imaging exams revealed an unspecified thinning of the cortical bone of the inferior alveolar canal in the right mandibular ramus, associated with erosion of the alveolar bone. Histopathological analysis confirmed metastasis of Ewing sarcoma. The patient presented an aggressive disease progression and died 1 month after the oral diagnosis. It is important to recognize the signs and symptoms compatible with rare clinical outcomes, leading to an early diagnosis that can improve patients' quality of life and survival.

Resistance training with different repetition duration to failure: effect on hypertrophy, strength and muscle activation.

BACKGROUND: This study investigated the effects of two 14-week resistance training protocols with different repetition duration (RD) performed to muscle failure (MF) on gains in strength and muscle hypertrophy as well as on normalized electromyographic (EMG) amplitude and force-angle relationships. METHODS: The left and right legs of ten untrained males were assigned to either one of the two protocols (2-s or 6-s RD) incorporating unilateral knee extension exercise. Both protocols were performed with 3-4 sets, 50-60% of the one-repetition maximum (1RM), and 3 min rest. Rectus femoris and vastus lateralis cross-sectional areas (CSA), maximal voluntary isometric contraction (MVIC) at 30o and 90o of knee flexion and 1RM performance were assessed before and after the training period. In addition, normalized EMG amplitude-angle and force-angle relationships were assessed in the 6th and 39th experimental sessions. RESULTS: The 6-s RD protocol induced larger gains in MVIC at 30o of knee angle measurement than the 2-s RD protocol. Increases in MVIC at 90o of knee angle, 1RM, rectus femoris and vastus lateralis CSA were not significant between the 2-s and 6-s RD protocols. Moreover, different normalized EMG amplitude-angle and force-angle values were detected between protocols over most of the angles analyzed. CONCLUSION: Performing longer RD could be a more appropriate strategy to provide greater gains in isometric maximal muscle strength at shortened knee positions. However, similar maximum dynamic strength and muscle hypertrophy gains would be provided by protocols with different RD.

Barreiras para a prática de atividade física em idosos: revisão de escopo de estudos brasileiros / Barriers to physical activity in elderly: scoping review of Brazilian studies

Com objetivo de identificar as barreiras à prática de atividade física (AF) em idosos, foi conduzida uma revisão de escopo, com buscas em sete bases de dados eletrônicas e em listas de referências, abrangendo artigos disponíveis até dezembro de 2020. Procurou-se por estudos originais, desenvolvi-dos no Brasil, que investigaram barreiras à prática de AF em amostras de pessoas ≥ 60 anos. Dos 911 artigos iniciais, 13 compuseram a síntese, envolvendo idosos participantes de grupos de convivência, institucionalizados e participantes de projetos de AF, com predominância de mulheres. Foram iden-tificadas 31 barreiras, sendo 18 delas classificadas como intrapessoais (58,1%). "Doença, dor ou lesão" foi a barreira mais frequentemente mencionada entre os estudos (n = 9), estando também associada à inatividade física em um artigo. Também merecem destaque: "falta de segurança" (n = 6), "medo de cair/se machucar" (n = 3) e "sentir-se suficientemente ativo" (n = 3). As barreiras intrapessoais são as mais percebidas pelos idosos brasileiros, sendo a barreira "dor, doença e/ou lesão" a mais fre-quentemente mencionada, seguida das barreiras "falta de segurança"; "medo de cair/se machucar" e "sentir-se suficientemente ativo". Mesmo que esta evidência esteja amparada, em sua maior parte, por dados provenientes da região Sul do país, o reconhecimento destas barreiras pode ser incorporada nos distintos cenários de oferta da AF para idosos. Complementarmente, futuros estudos são importan-tes, tanto para apresentação das principais barreiras para a AF nas distintas regiões do país, quanto para a análise das suas possíveis associações à inatividade física

In order to identify barriers to physical activity (PA) in the elderly, we conducted a scoping review, with searches in seven electronic databases and reference lists, covering articles available until December 2020. We searched for original studies, developed in Brazil, that investigated barriers to PA in samples of ≥ 60 years people. Of the 911 initial results, 13 composed the synthesis, involving elderly participants of sociali-zation groups, institutionalized and participants of PA projects, with a predominance of women. Thirty-one barriers were identified, 18 of which were classified as intrapersonal (58.1%). "Disease, pain or injury" was the most frequently mentioned barrier among the studies (n = 9), being also associated with physical inactivity in one article. Also noteworthy were "lack of safety" (n = 6), "fear of falling/injury" (n = 3), and "feeling active enough" (n = 3). Intrapersonal barriers are the most perceived by Brazilian elderly, with "pain, illness and/or injury" being the most frequently mentioned barrier, followed by "lack of safety", "fear of falling/injury", and "feeling active enough". Even though this evidence is mostly supported by data from the Southern region of the country, the recognition of these barriers can be incorporated into the different scenarios of PA supply for the elderly. In addition, future studies are important, both for the presentation of the main barriers to PA in different regions of the country, and for the analysis of their possible associations with physical inactivity

Ophthalmic artery resistance index after peribulbar block in the presence of epinephrine.

PURPOSE: There are controversies regarding ophthalmic artery (OA) flow after peribulbar block in the presence of epinephrine. Therefore, we aimed to evaluate OA flow via echo-Doppler before and after peribulbar block with lidocaine in the presence or absence of epinephrine. METHODS: Fifty-six patients who had an American Society of Anesthesiologists (ASA) classification of I, II or III and were eligible for cataract phacoemulsification surgery were selected. Patients with other eye diseases were excluded. Patients were divided into two groups: group 1-peribulbar block with lidocaine and 1/200,000 epinephrine; group 2-peribulbar block with lidocaine in the absence of epinephrine. The resistance index (RI), peak systolic velocity (PSV), end diastolic velocity (EDV) of the OA were evaluated using echo-Doppler before and 10 min after the peribulbar block. RESULTS: No differences between groups were observed in the RI before the peribulbar block as well regarding the presence of hypertension and the age or gender of the patient. After the peribulbar block, we observed a decrease in the RI in group 1 (p = 0.038, Cohen's d = 0.336) and no difference in the RI in group 2 (p = 0.109, Cohen's d = 0.172). When comparing group 1 and group 2, we observed a decrease in the RI in group 1 (p = 0.028, Cohen's d = 0,583). There was no difference between groups regarding the PSV and EDV after the peribulbar block. CONCLUSIONS: A decrease in RI was observed in the OA after peribulbar block with a vasoconstrictor, an effect that could be a benefit in some ocular surgeries.

Fungi associated with Paspalum guenoarum seeds: their impact on physiology and control / Fungos associados com sementes de Paspalum guenoarum: seus impactos na fisiologia e controle

ABSTRACT: Of the natural pastures grown in southern Brazil, those of the genus Paspalum are the most important. One of the factors that hinder their cultivation is the availability of quality seeds, that are often compromised by the presence of fungi. This study determined the in vitro sensitivity of Paspalum guenoarum ecotype azulão seed-associated fungus to certain fungicides and to measure the efficiency of chemical treatments for fungal control and seed physiological performance. Bipolaris micropus, Epicoccum sorghinum, Curvularia geniculata and Fusarium incarnatum associated with seeds were tested in vitro against Carbendazim; Tiram, Fludioxonil; Metalaxil-M, Carboxina; Tiram and Tiofanato-metílico at 0, 1, 2.5, 5, 10 and 30 µg/mL. This experiment was conducted in a completely randomized design (factorial 4 × 4 × 6). Qualitative variables were compared using the Tukey test (P ≤ 0.05) and quantitative variables were subjected to regression analysis. Carbendazim; Tiram and Fludioxonil; Metalaxil-M had the best fungicidal performances, each inhibiting three of the four fungi with LD50s below 1 µg/mL. Subsequently, these two fungicides were used alone or in combination in the in vivo test. A completely randomized design was used and the means were compared using the Tukey test (P < 0.05). The chemical treatment of the seeds resulted in improvement of five of the six evaluated physiological parameters. The identification of the primary fungi associated with Paspalum seeds reported in this research, as well as damage done to them, can be diminished using appropriate measures such as seed treatments.

RESUMO: Das pastagens naturais cultivadas no sul do Brasil, as do gênero Paspalum são as mais importantes. Um dos fatores que dificultam o cultivo é a disponibilidade de sementes de qualidade, muitas vezes comprometidas pela presença de fungos. Os objetivos deste estudo foram determinar a sensibilidade in vitro de fungos associados a sementes de Paspalum guenoarum ecótipo azulão a determinados fungicidas, medir a eficiência de tratamentos químicos para controle desses fungos e o desempenho fisiológico das sementes. Os fungos associados às sementes, Bipolaris micropus, Epicoccum sorghinum, Curvularia geniculata e Fusarium incarnatum foram testados in vitro contra Carbendazim; Tiram, Fludioxonil; Metalaxil-M, Carboxina; Tiram e Tiofanato-metílico em 0, 1, 2,5, 5, 10 e 30 µg/mL. Este experimento foi conduzido em um delineamento inteiramente casualizado (fatorial 4 × 4 × 6). As variáveis ​​qualitativas foram comparadas pelo teste de Tukey (P ≤ 0,05) e as variáveis ​​quantitativas foram submetidas à análise de regressão. Carbendazim; Tiram e Fludioxonil; Metalaxil-M tiveram os melhores desempenhos fungicidas, cada um inibindo três dos quatro fungos com LD50 abaixo de 1 µg/mL. Posteriormente, esses dois fungicidas foram utilizados isoladamente ou em combinação no teste in vivo. O delineamento experimental foi inteiramente casualizado e as médias comparadas pelo teste de Tukey (P < 0,05). O tratamento químico das sementes resultou na melhoria de cinco dos seis parâmetros fisiológicos avaliados. A identificação dos fungos primários associados às sementes de Paspalum relatadas neste trabalho, bem como os danos causados ​​por eles, podem ser diminuídos usando medidas apropriadas, como tratamento de sementes.

Who seeks Internet-based interventions for depression in Brazil? / Quem procura intervenções baseadas na Internet para a depressão no Brasil?

Specific psychological treatments for depressive disorders delivered on the Internet have shown effectiveness and presented advantages over face-to-face treatments (potentially less expensive, flexible schedules, available in remote areas). This paper aims to describe the characteristics of those who sought help from an online self-guided intervention for depression and to explore hypotheses about predictors of enrollment to the program. Based on a sample of 282 of individuals who filled in screening questionnaires, we verified that the respondents were mainly female, were on average 34.36 years old, were primarily recruited through Facebook, had been previously diagnosed by mental health professionals, presented moderate self-efficacy perception, and had moderately severe symptoms of depression. Respondents who reported comorbid conditions were more likely to attend enrollment interviews, and being in treatment or not did not influence attendance. Such characterization may provide strategies to reach more people and to optimize the design of interventions targeting help-seeking depressed individuals in Brazil.

Alguns tratamentos para a depressão baseados na Internet se mostraram efetivos e apresentaram vantagens em relação a tratamentos presenciais (potencialmente menos caros, com horários mais flexíveis e com disponibilidade em áreas remotas). Este artigo descreve as características de indivíduos que procuraram ajuda de uma intervenção autoguiada on-line e explora hipóteses sobre preditores de adesão ao programa. Baseado em uma amostra de 282 indivíduos que preencheram questionários de triagem, verificou-se que os participantes eram majoritariamente mulheres, tinham em média 34,36 anos, foram recrutados em sua maioria pelo Facebook, apresentaram diagnóstico psiquiátrico prévio feito por algum profissional de saúde mental, apresentaram percepção de autoeficácia moderada e sintomas depressivos moderadamente severos. Os respondentes que relataram condições comórbidas apresentaram mais chances de avançar para as entrevistas diagnósticas, e estar ou não em tratamento não influenciou a chegada às entrevistas. Estas descrições podem auxiliar na identificação de estratégias para se atingir mais indivíduos e para otimizar o desenho das intervenções on-line para brasileiros que as buscam.

Protocolo Calma nessa hora: acolhimento interdisciplinar em saúde mental para situações de crise e emergências / Keep Calm protocol: interdisciplinary support in mental health for crisis and emergencies situations / Protocolo Calma en esta hora: acogimiento interdisciplinario en salud mental para situaciones de crisis y emergencias

O estudo apresenta o protocolo de acolhimento do Calma Nessa Hora, um serviço de e-health via chat, de apoio a pessoas em sofrimento psicológico diante da COVID-19. Foi elaborado um diagrama de fluxo de atendimento com previsão de início e fim em uma sessão, contendo três etapas: avaliação, acolhimento e finalização. Cada etapa possuía marcos de tomada de decisão sobre o fluxo diante do conteúdo e do grau de risco da demanda. Na etapa de acolhimento foram priorizadas demandas de baixo e médio risco associadas à COVID-19, como questões sociais e de saúde; ansiedade, depressão ou luto; conflitos familiares e de trabalho. Situações de elevado risco, como intenção suicida e violência, seguiram fluxo específico de encaminhamento para a rede de saúde. O artigo descreve cada etapa e os diferentes fluxos a partir de casos-exemplo. O protocolo é interdisciplinar, com potencial aplicação em serviços de atenção à saúde e serviços-escola nas universidades

This paper presents the protocol of support from Keep Calm, an e-health service via chat for people suffering from psychological distress related to COVID-19. A flowchart diagram of one-session chats was developed. Each session consisted of three steps: evaluation, support and conclusion. For each stage, decision-making milestones on what to do next were taken according to content and risk degree of the demand. At the support step, demands related toCOVID-19 that did not involve high-risk situations were prioritized, that is, social and health issues, anxiety, depression symptoms or grief, and family or work conflicts. High-risk situations such as suicidal intention and violence, followed a specific referral flow to healthcare services. The article describes each step in detail and exemplifies the different flows according to case examples. The protocol is interdisciplinary and has the potential to be applied in health care services and school care services in universities

El estudio presenta el protocolo del apoyo del Calma En Esta Hora, un servicio de e-health via chat de apoyo para personas con problemas psicológicos como consecuencia de COVID-19. Se preparó un flujograma con inicio y fin en una sesión, en tres etapas: evaluación, acogimiento y finalización. Para cada etapa se definieron hitos de decisión sobre el flujo en función del contenido y el grado de riesgo de la demanda. En la etapa de acogida, se priorizaron las demandas de bajo y medio riesgo asociadas a Covid-19, como problemas sociales y de salud; ansiedad, depresión o duelo; conflictos familiares y laborales. Las situaciones de alto riesgo, como intención de suicídio y violencia, siguieron un flujo específico a la red sanitaria. El artículo describe cada paso y los flujos basándose en casos de ejemplo. El protocolo es interdisciplinario con potencial aplicación en los servicios de salud y en las universidades