Oct 31, 2015 - knee movement and visually perturbed drop landing neuromuscular control, and if ACLR ... neuromuscular control despite current therapy.
10/31/2015
Oasis, The Online Abstract Submission System
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Control/Tracking Number: 16SA3183ACSM Activity: Scientific Abstract Current Date/Time: 10/31/2015 4:09:00 PM The BrainBehavior relationship after Anterior Cruciate Ligament Reconstruction
Author Block: Dustin R. Grooms1, Ajit M.W. Chaudhari, FACSM2, Stephen J. Page2, Deborah NicholsLarsen2, Susan E. White2, James A. Onate2. 1Ohio University, Athens, OH. 2Ohio State University, Columbus, OH. (Sponsor: Ajit Chaudhari, FACSM) Abstract: Anterior cruciate ligament injury may induce neural adaptations that are unresolved with conventional reconstruction and rehabilitation techniques. Visualmotor function appears to be a key driver of this neuroplasticity. However, the relationship between the neuroplasticity after ACLR (anterior cruciate ligament reconstruction) and visually perturbed neuromuscular control is unknown. PURPOSE: To determine if a relationship exists between brain activation during knee movement and visually perturbed drop landing neuromuscular control, and if ACLR alters this relationship. METHODS:Participants consisted of 26 recreationally active individuals from the local university community (13 ACLR, 13 control matched on height, mass, extremity dominance, education level, history and current physical activity level). A drop vertical jump was completed to assess functional neuromuscular control (knee flexion and adduction). Stroboscopic eyewear provided a visually perturbed condition. The effect of disrupting visual feedback was calculated with a mean change score from the full vison to the disrupted condition. Brain functional magnetic resonance imaging was collected during a unilateral knee motor task of the involved or matched control knee consisting of repeated cycles of extensionflexion. The percent signal change of the motor cortex and lingual gyrus were calculated and correlated against the stroboscopic effect on knee flexion and adduction. RESULTS:Lingual gyrus activation was correlated with the stroboscopic effect on knee flexion for the ACLR (r=0.582, p=0.037) and control (r=0.688, p=0.009) cohorts. Motor cortex activation was correlated with the stroboscopic effect on knee adduction for only the ACLR (r=0.683, p=0.005) cohort. CONCLUSIONS: The motor neuroplasticity associated with ACLR is moderately related to visually perturbed drop landing neuromuscular control. These findings indicate visualmotor control maybe a driving factor behind neuromuscular control changes after ACLR, and a possible contributing mechanism to the continued poor neuromuscular control despite current therapy. Additional attention to the sensorymotor and visualmotor interaction after injury and during therapy may provide a means to improve neuromuscular therapy. : Author Disclosure Information: D.R. Grooms: None. Category (Complete): 0405. Biomechanics and Neural Control of Movement motor control http://www.abstractsonline.com/submit/SubmitPrinterFriendlyVersion.asp?ControlKey=%7B06FB58F6%2DB1DB%2D48ED%2DA432%2D5D680E174CE4%…
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10/31/2015
Oasis, The Online Abstract Submission System
Keyword (Complete): Neuroplasticity ; Neuromuscular ; Visualmotor Unlabeled/ Investigational Products (Complete): : No Presentation Preference (Complete): Slide Preferred Area of Interest (Complete): Area of Interest: Applied Science Additional Info (Complete): *Do you authorize ACSM to record your presentation?: Yes *Confirmation: I understand and agree to the above terms regarding AV equipment Payment (Complete): Your credit card order has been processed on Saturday 31 October 2015 at 4:08 PM. Status: Complete OASIS Helpdesk American College of Sports Medicine 401 West Michigan Street Indianapolis, IN 462023233 (317) 6379200 Leave OASIS Feedback Powered by OASIS, The Online Abstract Submission and Invitation System SM © 1996 2015 CoeTruman Technologies, Inc. All rights reserved.
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