“…MTBI gives rise to a constellation of symptoms termed the postconcussion disorder (PCD), of which complaints of headache, fatigue, depression, anxiety, irritability, and cognitive difficulties figure prominently [5][6][7][8][9][10]. The natural history of PCD is generally toward spontaneous resolution with time; however, 15% of patients continue to suffer disabling symptoms 1 year postinjury [11,12].…”