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.
Jeffrey Barth, PhD, is a Professor Emeritus in the UVA Medical School and the Brain Injury and Sports Concussion Institute.
Produced by Victoria Tilney McDonough and Brian King, BrainLine.