Each recording session with the HS-1000 will last 10 consecutive minutes, if the patient's condition and clinical workflow permits. If required by the attending medical staff, the recording can be stopped and restarted at a later time during the day. The HS-1000 will be used as a seamless adjunctive, state-of-the-art, brain monitoring utility operating in parallel with standard care intensive neurological monitoring modalities. The non-invasive monitor will not replace or alter the standard care received by patients. Once all recordings are completed, the brain monitoring signals will be saved in the study's database.