• Experienced a concussion within the last 3 weeks, defined as a person who has had a traumatically induced physiological disruption of brain function, manifested by at least one of the following: Any period of loss of consciousness; Any loss of memory for events immediately before or after the accident; Any alteration in mental state at the time of the accident (ie., feeling dazed, disoriented, or confused) Symptoms of nausea, dizziness, fatigue, headache, or changes in sleep, cognition or, emotions following the accident