4.5 Article

Changes in cortical beta activity related to a biceps brachii movement task while experiencing exercise induced muscle damage

Journal

PHYSIOLOGY & BEHAVIOR
Volume 123, Issue -, Pages 1-10

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.physbeh.2013.08.022

Keywords

EIMD; Pain; Cortical activity; Neuromuscular function; EEG; EMG; Beta frequency; Cortex

Funding

  1. Medical Research Council of South Africa, Discovery Health
  2. University of Cape Town

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Exercise-induced-muscle-damage (EIMD) is a well-described phenomenon which leads to decreased force output and altered neuromuscular function. How these symptoms of EIMD affect brain function, in particular cortical activity has not been described. Therefore the aim of this study was to investigate the relationship between the symptoms of EIMD and cortical beta (beta) activity during a submaximal biceps brachii movement. Half of the subjects participated in an EIMD protocol. Control and EIMD groups were monitored for 132 h thereafter. Muscle pain scores in the EIMD group peaked after 36 h with the lowest muscle torque reported at 12 h. Beta-1 and -2 activity was increased in the frontal and parietal area in the experimental group at 12 h. This suggests an impact of EIMD induced neuromuscular changes on the cortical proprioceptive and motor perceptive networks. Beta-2 activity decreased in the control group over time suggesting a loss in focused attention and greater familiarization with the protocol as the study progressed. These data suggest that a change in beta-1 and -2 activity is associated with integrating movement perception and proprioception post-EIMD. (C) 2013 The Authors. Published by Elsevier Inc. All rights reserved.

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