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Investigating the Muscular and Kinematic Responses to Sudden Wrist Perturbations During a Dynamic Tracking Task.
Forman, Garrick N; Forman, Davis A; Avila-Mireles, Edwin J; Zenzeri, Jacopo; Holmes, Michael W R.
Afiliación
  • Forman GN; Faculty of Applied Health Sciences, Brock University, St. Catharines, ON, Canada.
  • Forman DA; Faculty of Science, University of Ontario Institute of Technology, Oshawa, ON, Canada.
  • Avila-Mireles EJ; Robotics, Brain and Cognitive Sciences, Istituto Italiano di Tecnologia, Genoa, Italy.
  • Zenzeri J; Robotics, Brain and Cognitive Sciences, Istituto Italiano di Tecnologia, Genoa, Italy.
  • Holmes MWR; Faculty of Applied Health Sciences, Brock University, St. Catharines, ON, Canada. michael.holmes@brocku.ca.
Sci Rep ; 10(1): 4161, 2020 03 05.
Article en En | MEDLINE | ID: mdl-32139793
Sudden disturbances (perturbations) to the hand and wrist are commonplace in daily activities and workplaces when interacting with tools and the environment. It is important to understand how perturbations influence forearm musculature and task performance when identifying injury mechanisms. The purpose of this work was to evaluate changes in forearm muscle activity and co-contraction caused by wrist perturbations during a dynamic wrist tracking task. Surface electromyography was recorded from eight muscles of the upper-limb. Participants performed trials consisting of 17 repetitions of ±40° of wrist flexion/extension using a robotic device. During trials, participants received radial or ulnar perturbations that were delivered during flexion or extension, and with known or unknown timing. Co-contraction ratios for all muscle pairs showed significantly greater extensor activity across all experimental conditions. Of all antagonistic muscle pairs, the flexor carpi radialis (FCR)-extensor carpi radialis (ECR) muscle pair had the greatest change in co-contraction, producing 1602% greater co-contraction during flexion trials than during extensions trials. Expected perturbations produced greater anticipatory (immediately prior to the perturbation) muscle activity than unexpected, resulting in a 30% decrease in wrist displacement. While improving performance, this increase in anticipatory muscle activity may leave muscles susceptible to early-onset fatigue, which could lead to chronic overuse injuries in the workplace.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Articulación de la Muñeca / Rango del Movimiento Articular / Músculo Esquelético Límite: Adult / Humans / Male Idioma: En Revista: Sci Rep Año: 2020 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Articulación de la Muñeca / Rango del Movimiento Articular / Músculo Esquelético Límite: Adult / Humans / Male Idioma: En Revista: Sci Rep Año: 2020 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Reino Unido