Torque steadiness and muscle activation are bilaterally impaired during shoulder abduction and flexion in chronic post-stroke subjects

Autor(es)

Santos, Gabriela Lopes ; Fernanda Garcia-Salazar, Luisa ; Souza, Matheus Braganca ; Oliveira, Ana Beatriz ; Camargo, Paula Rezende ; Russo, Thiago Luiz

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY; v. 30, p. 151-160, OCT 2016.
• Citações Web of Science: 3

Resumo

Objective: To characterize sensorimotor control and muscle activation in the shoulder of chronic hemiparetic during abduction and flexion in maximal and submaximal isometric contractions. Furthermore, to correlate submaximal sensorimotor control with motor impairment and degree of shoulder subluxation. Methods: Thirteen chronic hemiparetic post-stroke age-gender matched with healthy were included. Isometric torques were assessed using a dynamometer. Electromyographic activity of the anterior and middle deltoid, upper trapezius, pectoralis major and serratus anterior muscles were collected. Variables were calculated for torque: peak, time to target, standard deviation (SD), coefficient of variation (CV), and standard error (RMSE); for muscle activity: maximum and minimum values, range and coefficient of activation. Motor impairment was determined by Fugl-Meyer and shoulder subluxation was measured with a caliper. Results: Paretic and non-paretic limbs reduced peak and muscle activation during maximal isometric contraction. Paretic limb generated lower force when compared with non-paretic and control. Paretic and non-paretic presented higher values of SD, CV, RMSE, and CV for prime mover muscles and minimum values for all muscles during steadiness. No correlation was found between sensorimotor control, motor impairment and shoulder subluxation. Conclusion: Chronic hemiparetic presented bilateral deficits in sensorimotor and muscle control during maximal and submaximal shoulder abduction and flexion. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/25845-6 - Efeitos da bandagem elástica na propriocepção do ombro e no desempenho sensório-motor durante o alcance em indivíduos hemiparéticos crônicos
• Beneficiário: Gabriela Lopes dos Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/21621-3 - Efeito do treino tarefa específica sobre adaptação muscular em gerbilos pós-acidente vascular encefálico isquêmico
• Beneficiário: Thiago Luiz de Russo
• Modalidade de apoio: Auxílio à Pesquisa - Regular