Changes in cortical beta activity related to a biceps brachii movement task while experiencing exercise induced muscle damage.
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 (β) activity during a submaximal biceps brachii movement. Half of the subjects participated in an EIMD protocol. Control and EIMD groups were monitored for 132h thereafter. Muscle pain scores in the EIMD group peaked after 36h with the lowest muscle torque reported at 12h. Beta-1 and -2 activity was increased in the frontal and parietal area in the experimental group at 12h. 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 β-1 and -2 activity is associated with integrating movement perception and proprioception post-EIMD.
UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Sport Science Institute of South Africa, Newlands, South Africa. Electronic address: kristina.plattner@gmail.com.
Kristina
K
Plattner
Michael I
MI
Lambert
Nicholas
N
Tam
Robert P
RP
Lamberts
Jochen
J
Baumeister
D000328:Adult; D001132:Arm / Q000294:innervation; D001611:Beta Rhythm / Q000502:physiology*; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000503:physiopathology*; D003402:Creatine Kinase / Q000097:blood; D004551:Elbow Joint / Q000294:innervation; D004569:Electroencephalography; D004576:Electromyography; D015444:Exercise; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D009119:Muscle Contraction / Q000502:physiology; D009135:Muscular Diseases / Q000209:etiology* / Q000473:pathology*; D013997:Time Factors; D055815:Young Adult
D003402:Creatine Kinase
Beta frequency; Cortex; Cortical activity; EEG; EIMD; EMG; Neuromuscular function; Pain