Validation Of TBI Detection System For Head Injured Patients

Inclusion Criteria: * Subjects who are admitted to the ED and are suspected of a traumatic, closed head injury within 72 hours. The patient will have a GCS 12-15 upon arrival to the ED even if GCS was lower prior to arrival to the ED (e.g., at the time of injury). Exclusion Criteria: * Subjects will be excluded who have forehead, scalp, or skull abnormalities or other conditions that would prevent correct application of the electrode headset on the skin. * In addition, * subjects with dementia, * Parkinson's Disease, * multiple sclerosis, * seizure disorder, * brain tumors, * history of brain surgery, * evidence of acute psychosis, * substance dependence, * history of TIA or stroke within the last year, * currently receiving dialysis or in end-stage renal disease, * active fever defined as greater than 100 degrees F or 37.7 degrees C, * current condition is "critical" in the opinion of the investigator, * subject is suffering from an open head injury, * subject requires advanced airway management (i.e. mechanical ventilation), * currently receiving procedural sedation medications. * Subjects below the age of 18 years, and prisoners will not be eligible for study.