Repeated Concussions Impair Behavioral and Neurophysiological Changes in the Motor Learning System

Area of Science:

• Neuroscience
• Sports Medicine
• Neurology

Background:

• Concussions are a leading cause of traumatic brain injury-related emergency visits in youth.
• Motor symptoms can be early indicators of neurodegenerative traumatic brain injuries.
• The impact of repeated concussions on motor learning remains poorly understood.

Purpose of the Study:

• To investigate how concussion acuity affects behavioral and neurophysiological components of motor learning.
• To examine the relationship between concussion history and motor learning deficits.

Main Methods:

• Assessed behavioral measures of motor learning and neurophysiological measures of retention (occlusion).
• Collected quantitative survey data on affective symptoms.
• Stratified collegiate athletes into non-concussion, chronic (>1 year post-injury), and acute (<2 weeks post-injury) groups.

Main Results:

• Athletes in acute and chronic concussion states showed impaired motor skill learning retention and aberrant occlusion compared to controls.
• Increased number of previous concussions correlated with more severe motor impairments.
• Concussions hinder neurophysiological learning mechanisms, affecting behavior.

Conclusions:

• Motor learning impairment is evident within two weeks post-concussion.
• Findings highlight the need for concussion prevention and targeted rehabilitation.
• Motor deficits have implications for concussion prognosis.