Impairment of electrical activation of wrist flexor and extensor muscles during gripping and functional activities in the early stage of hand osteoarthritis: A cross-sectional study

Autor(es)

Tossini, Natalia Barbosa ^[1] ; Lessi, Giovanna Camparis ^[2] ; Zacharias, Andre Luis Simoes ^[1] ; Silva, Gabriella Regina Correa e ^[1] ; Abrantes, Luiza Souza Seraphim ^[1] ; Serrao, Paula Regina Mendes da Silva ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Phys Therapy, Highway Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Tiradentes Univ Ctr, Maceio, Alagoas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF HAND THERAPY; v. 34, n. 1, p. 109-115, JAN-MAR 2021.
• Citações Web of Science: 0

Resumo

Study Design: This is a cross-sectional study. Introduction: The wrist extensor muscles have a fundamental role in the stabilization of the wrist while performing manual activities. However, it is unknown if the clinical signs of hand osteoarthritis (HOA) cause impairment in the activation of these muscles Purpose of the Study: The purpose of this study was to investigate whether early-stage HOA affects the magnitude of activation and coactivation between the wrist extensor and flexor muscles Methods: Thirty-two subjects were divided into two groups: control group (n = 16; 55 +/- 7.42 years) and a group with HOA grades 2 or 3 (HOAG; n = 16; 57 +/- 7.82 years). Muscle activation was measured in m. flexor digitorum superficialis, m. flexor carpi ulnaris (FCU) and extensors (EXT) during the evaluation of grip strength and three manual activities (write, cut a paper with scissors, and close and open a bottle). The coactivation index was calculated between the electromyography of the flexors (FCU and FSD) and wrist EXT. Results: HOAG presented reduced muscle activation in all tasks, with a statistical difference for the flexor digitorum superficialis and EXT in the scissors activity, and for the FCU in the bottle activity. No differences were found between groups for the coactivation index and grip strength. Discussion: The reduced muscle activity may be due to an inability of the patients of the HOAG to recruit all motor units or to an inhibition related to the presence of pain. Conclusion: In the early stages of HOA, there is a functional deficit associated with a reduced muscle activity of the wrist muscles during manual activities. (C) 2020 Hanley \& Belfus, an imprint of Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 17/05381-3 - Coativação entre extensores e flexores do punho durante atividades funcionais em sujeitos com osteoartrite de mão
• Beneficiário: Gabriella Regina Correa e Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 16/24311-3 - Avaliação da atividade elétrica de flexores e extensores do punho durante a execução de tarefas funcionais em sujeitos com graus iniciais de osteoartrite de mão
• Beneficiário: André Luis Simões Zacharias
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica