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).
Concussions in American football
Current NFL concussion protocol creates positions in each organization's medical staff who are specifically charged with identifying and diagnosing concussions. One of these roles involves an unaffiliated neurotrauma consultant who work with other team physicians and athletic trainers to conduct evaluations. Another position involves athletic trainers who are positioned in the booth at every game to spot potential concussions in players from both teams. These spotters review film throughout the game that could possibly result in concussions and are capable to call "medical timeouts" to relay that information to the medical personnel on the sidelines so that further evaluation can be conducted. These spotters have been in use since the 2011 season.