Post-concussion syndrome
Post-concussion syndrome, also known as postconcussive syndrome or PCS, is a set of symptoms that may continue for weeks, months, or a year or more after a concussion – a mild form of traumatic brain injury (TBI). The rates of PCS vary, but most studies report that about 15% of individuals with a history of a single concussion develop persistent symptoms associated with the injury. A diagnosis may be made when symptoms resulting from concussion last for more than three months after the injury. Loss of consciousness is not required for a diagnosis of concussion or post-concussion syndrome.
Harry Carson
While Carson has acknowledged he has "managed" the long term effects of concussions he does not know if he has been affected by chronic traumatic encephalopathy (CTE). When asked, Carson is increasingly critical of the NFL and questions whether football should be played, as he believes the hazards of concussions and subconcussive hits are not an understood risk such as physical ailments are. He is quoted in this interview as saying of the NFL's $765 million settlement with former players that "the NFL has given everybody 765 million reasons why you don't want to play football."