Recovery Study for Patients in Coma or Unconsciousness

Inclusion Criteria: * Age greater than or equal to 18 years on the day of hospital admission * Coma duration of at least 24 hours from presentation to the receiving hospital, or died prior to the 24 hour timepoint without return of consciousness. Coma defined as: GCS score of less than or equal to 10 AND GCS score of less than 6 on the motor component of the GCS(not following commands) AND GCS score less than 3 on the verbal component AND alteration of consciousness not explained by sedation only * Coma due to a neurological process (Including but not limited to: trauma, stroke, hypoxic- ischemic brain injury (HIBI), CNS infection, seizure, other processes at the discretion of the investigator) * Admission to the intensive care unit, or deceased prior to admission. Exclusion Criteria: * Pre-existing score of 5 or less on the motor component of the Glasgow Coma Scale prior to hospital admission. * Transfer from another acute care hospital in which the motor component of the Glasgow Coma Scale on the day after initial hospital arrival is not known or cannot be reconstructed from medical records or history. * Coma due to sepsis, systemic metabolic processes (ex: organ failure or sedation). * GCS score of greater than 2 for eye opening with lack of command following due to a focal brain lesion causing receptive aphasia. * Prisoner