Post-concussion syndrome
Though no universally accepted definition of postconcussive syndrome exists, most of the literature defines the syndrome as the development of at least 3 of the following symptoms: headache, dizziness, fatigue, irritability, impaired memory and concentration, insomnia, and lowered tolerance for noise and light. One complication in diagnosis is that symptoms of PCS also occur in people who have no history of head injury, but who have other medical and psychological complaints. In one study 64% of people with TBI, 11% of those with brain injuries, and 7% of those with other injuries met the DSM-IV criteria for post-concussion syndrome. Many of these PCS sufferers were misdiagnosed as having other unrelated conditions due to commonality of symptoms. (see diagnosis, below).
National Football League controversies
The league has also been criticized for its efforts in preventing concussions, in which eight former players have died, and have also had concussions throughout their careers. In 1994, former commissioner Paul Tagliabue created the Mild Traumatic Brain Injury Committee in order to study the effects of concussions on players. With the suicide of linebacker Junior Seau in 2012, concerns arose about the connection between player deaths and concussions. As a result, on April 9, 2013, a lawsuit involving 4,100 plaintiffs and 222 consolidated lawsuits against the NFL will be held by a federal court.