Evidence continues to mount that professional athletes in a number of contact sports are suffering brain damage as a result of head impacts. But there is no reliable test to detect the injury, called chronic traumatic encephalopathy, in its earliest stages.
"The Earliest Signs of Brain Damage? Just Listen" is from the May 29, 2017 Science section of The New York Times. It was written by Lawrence K. Altman, M.D. and narrated by Kristi Burns.