The Science Behind Second Impact Syndrome and Chronic Traumatic Encephalopathy

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.

Posted on BrainLine October 20, 2010. Reviewed December 20, 2017.

Produced by Victoria Tilney McDonough and Brian King, BrainLine.