Post-concussion syndrome
About 10% of people with PCS develop sensitivity to light or noise, about 5% experience a decreased sense of taste or smell, and about 14% report blurred vision. People may also have double vision or ringing in the ears, also called tinnitus. PCS may cause insomnia, fatigue, or other problems with sleep.
Sean Morey (American football)
In October 2010, Morey was named co-chair of the NFL Players Association's newly formed Concussion and Traumatic Brain Injury Committee. Morey suffered more than twenty concussions in his career. Morey's committee has two main goals: the diagnosis, treatment, and prevention of concussions and traumatic brain injuries in active players and research into the long-term cumulative effects of such injuries on NFL players.