Identified in 1928, by Dr. Harrison Martland as "punch drunk syndrome." He saw difficulty with balance, speech and coordination in boxers.

More recently, the movie, "Concussion," raised awareness of sports-related concussions by illustrating the mental disturbances of Mike Webster and Justin Strelczyk. The movie focused on Chronic Traumatic Encephalopathy (CTE), which is defined as repeated mild traumatic brain injuries.