The Effect Of Acute Sports Concussion on Corticomotor Excitability in Australian Football Players.

Abstract

Event Abstract Back to Event The Effect Of Acute Sports Concussion on Corticomotor Excitability in Australian Football Players. Alan Pearce1*, Mark Rogers1, Daniel Corp1, Brendan Major1 and Kate Hoy2 1 Deakin University, Cognitive Neuroscience Unit, School of Psychology, Australia 2 Monash University, Monash Alfred Psychiatric research centre, Australia This study measured neurophysiological, motor and neurocognitive changes during the acute phase following a concussion in Australian football players. Forty males (mean 25.7±4.5yrs) from one club participated in the study. Prior to the start of the football season, all participants completed measures of visuomotor reaction and movement time, and neurocognitive assessments (implicit learning/attentional shifting). Transcranial magnetic stimulation (TMS) was used to measure corticomotor excitability, and intracortical inhibition (cortical silent period [cSP], short-interval intracortical inhibition [SICI]). As participants sustained a concussion they were tested at 48 and 96 hours, and 10 days post concussion. Players who did not receive a concussion returned to the laboratory for comparative testing at similar time points. Mixed-design repeated measures ANOVA (with post-hocs) was used to compare differences across groups and time. During the course of the season 8 players (mean 25.0±4.6yrs) were diagnosed having sustained a concussion, compared to 15 non-injured players (mean 25.3±4.4yrs). Concussed players showed slowing in reaction time (F2, 40=12.2; p<.001) at 48 hours (44.8ms; p<.001) and 96 hours (15ms; p=.02). Similarly, concussed players showed slowing in movement time (F2,40=3.27; p=.04) at 48 hours (29.33ms; p=.04) post concussion. Implicit learning showed no change, however concussed players performed significantly worse in the attentional shifting task (F2, 40=12.57; p=<.001) at 48 (p=.02) and 96 hours (p=.01). No differences between groups were found in corticomotor excitability or SICI. cSP significantly lengthened in the concussed group (F2, 40=5.99; p=.002), showing a mean increase of 13 ms (p=.04) and 15 ms (p=.02) at 48 and 96 hours respectively. In summary, following a concussion injury, intracortical inhibition is increased in the acute phase, visuomotor reaction and movement time performance is slowed, and attention-shifting ability is reduced. Keywords: Attention, Football, Transcranial Magnetic Stimulation, intracortical inhibition, Sports-related concussion, Visuomotor performance, Corticomotor Excitability Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Motor Behaviour Citation: Pearce A, Rogers M, Corp D, Major B and Hoy K (2015). The Effect Of Acute Sports Concussion on Corticomotor Excitability in Australian Football Players.. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00283 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Dr. Alan Pearce, Deakin University, Cognitive Neuroscience Unit, School of Psychology, Melbourne, Australia, alan.pearce@latrobe.edu.au Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Alan Pearce Mark Rogers Daniel Corp Brendan Major Kate Hoy Google Alan Pearce Mark Rogers Daniel Corp Brendan Major Kate Hoy Google Scholar Alan Pearce Mark Rogers Daniel Corp Brendan Major Kate Hoy PubMed Alan Pearce Mark Rogers Daniel Corp Brendan Major Kate Hoy Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.