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)
Three years later, Omalu is vindicated when Duerson commits suicide due to growing cognitive problems. In his suicide note, Duerson admits that Omalu was right. Omalu is allowed to address an NFLPA conference on concussions and CTE. He informs them that he once wished he had never known Mike Webster, but by knowing him, he has the responsibility to inform NFL players of the true risks that they take by playing. He says that he holds no resentment for the NFL and tells them to forgive themselves and be at peace. Amid growing scrutiny from Congress, the NFL is forced to take the concussion issue more seriously, and in 2011, NFL players sue the league for not properly informing them of the risk of CTE. Omalu is offered a job as chief medical examiner for the District of Columbia, but as explained in closing title cards, turns it down, remaining with Prema and their two children in California, where he became a U.S. citizen in February 2015. A final montage includes reports of Junior Seau's suicide in 2012, and the subsequent lawsuit brought by players.