Objective Brain Function Assessment of mTBI/Concussion

Inclusion Criteria: For Injured subjects: 1. Having sustained a traumatic closed head injury within 72 hours (3 days) from time of injury at time of BrainScope assessment; 2. GCS 13-15 at time of BrainScope assessment; 3. No hospital admission due to either head injury or collateral injuries for \>24 hours. For Matched Controls: 1. GCS 15 at time of BrainScope assessment; 2. No prior history of concussion or TBI in the last year. Exclusion Criteria: 1. Previously enrolled in the BrainScope CAS Studies; 2. Current CNS active prescription medications taken daily, with the exception of medications being taken for the treatment of Attention Deficit Disorder (ADD) or Attention Deficit Hyperactivity Disorder (ADHD); 3. Forehead, scalp or skull abnormalities that prevents headset application or EEG data collection; 4. History of brain surgery or neurological disease; 5. Pregnant women; 6. Subjects who do not speak English (non-English speaking parents are allowed to consent so long as translation of the consent form in their native language is available); 7. Acute intoxication; 8. Evidence of illicit drug usage; For Injured subjects: 1. Loss of consciousness ≥ 20 minutes related to the concussion injury; 2. Active fever defined as greater than 100ºF or 37.78ºC at time of BrainScope assessment; 3. Evidence of abnormality visible on Computerized Tomography (CT) of the head related to the traumatic event (Note: neuroimaging is not required for enrollment). For Matched Controls: 1. Any focal neurological signs including aphasia, apraxia, diplopia, facial droop, dysarthria/slurred speech; 2. History of Motor Vehicle Accident (MVA) requiring an Emergency Department visit within the past 1 year.