Concussion and the autonomic nervous system: An introduction to the field and the results of a systematic review.

Background: Recent evidence suggests that autonomic nervous dysfunction may be one of many potential factors contributing to persisting post-concussion symptoms.

Objective: This is the first systematic review to explore the impact of concussion on multiple aspects of autonomic nervous system functioning.

Methods: The methods employed are in compliance with the American Academy of Neurology (AAN) and PRISMA standards.