Second impact syndrome (SIS) can have in-an-instant, tragic consequences. Chronic traumatic encephalopathy (CTE), on the other hand, can have slow and heartbreaking consequences.
See more videos with Dr. Jeffrey Barth.
Produced by Victoria Tilney McDonough and Brian King, BrainLine.
Jeffrey Barth, PhD, is a Professor Emeritus in the UVA Medical School and the Brain Injury and Sports Concussion Institute.