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Right in Comparison to Left Cerebral Hemisphere Damage by Stroke Induces Poorer Muscular Responses to Stance Perturbation Regardless of Visual Information

Texto completo
Coelho, Daniel Boari [1, 2] ; Fernandes, Corina Aparecida [2] ; Martinelli, Alessandra Rezende [2] ; Teixeira, Luis Augusto [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Fed Univ ABC, Biomed Engn, Sao Bernardo Do Campo, SP - Brazil
[2] Univ Sao Paulo, Sch Phys Educ & Sport, Human Motor Syst Lab, Sao Paulo, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF STROKE & CEREBROVASCULAR DISEASES; v. 28, n. 4, p. 954-962, APR 2019.
Citações Web of Science: 0

Objective: Fast and scaled muscular activation is required to recover body balance following an external perturbation. An issue open to investigation is the extent to which the cerebral hemisphere lesioned by stroke leads to asymmetric deficits in postural reactive responses. In this experiment, we aimed to compare muscular responses to unanticipated stance perturbations between individuals who suffered unilateral stroke either to the right or to the left cerebral hemisphere. Methods: Stance perturbations were produced by releasing a load attached to the participant's trunk, inducing fast forward body oscillation. Electromyography was recorded from the gastrocnemius medialis and biceps femoris muscles. Muscular activation from age-matched healthy individuals was taken as reference. Results: Analysis indicated that damage to the right hemisphere induced delayed activation onset, and lower rate and magnitude of activation of the proximal and distal muscles of the paretic leg. Those deficits were associated with stronger activation of the nonparetic leg. Comparisons between left hemisphere damage and controls showed deficits limited to activation of the biceps femoris of the paretic leg. Manipulation of visual information led to no significant effects on muscular responses. Conclusions: These results suggest that right cerebral hemisphere damage by stroke leads to more severe deficits in the generation of reactive muscular responses to stance perturbation than damage to the left cerebral hemisphere regardless of visual information. (AU)

Processo FAPESP: 12/05769-8 - Assimetrias inter-hemisféricas no controle postural pós-acidente vascular encefálico: postura ereta quieta e recuperação do equilíbrio após perturbação
Beneficiário:Luis Augusto Teixeira
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 11/18173-3 - Recuperação do equilíbrio corporal em indivíduos pós-acidente vascular encefálico: reabilitação e ganho de estabilidade por toque em superfície vibratória
Beneficiário:Alessandra Rezende Martinelli Conterato
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 11/16667-9 - Assimetrias inter-hemisféricas no controle postural pós-acidente vascular encefálico: postura ereta quieta e recuperação do equilíbrio após perturbação
Beneficiário:Corina Aparecida Fernandes
Linha de fomento: Bolsas no Brasil - Mestrado