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).
Concussion (2015 film)
Over the next few years, Omalu discovers that three other former NFL players, Strzelczyk (died 2004), Terry Long (died 2005), and Andre Waters (died 2006), had symptoms very similar to Webster's. He finally persuades newly appointed NFL commissioner Roger Goodell to allow him to present his findings before a committee on player safety. However, the NFL does not take him seriously, and he is barred from the committee meeting, forcing Bailes, a former NFL employee, to give the presentation in his place. However, the meeting is a set up, where the NFL claims that the players' head trauma was due to past injuries, having nothing to do with football. As he leaves the meeting, former NFL Players Association executive Dave Duerson angrily confronts Omalu and tells him to "go back to Africa."