Transcutaneous Auricular Neurostimulation for ICU Patients With Traumatic Brain Injury

Inclusion Criteria: 1. Post-resuscitation GCS score 12 or below and acute trauma-related intradural blood on head CT scan after TB 2. Age 18 years or older (pediatric trauma patients are not routinely transported to Parkland) 3. Consent from legally authorized representative Exclusion Criteria: 1. Hemodynamic instability 2. Expected imminent mortality because of overwhelming neurological and/or systemic injury 3. Unclear neurological status because of paralytic medications or intoxication with ethanol or other drugs 4. Presence of other electrical stimulation devices (pacemaker, cochlear prosthesis, neurostimulator, etc.) 5. Abnormal ear anatomy or ear infection 6. Participant is pregnant or lactating 7. Any other significant medical or psychosocial problems that, in the opinion of the investigator, would potentially cause harm to the participant, impact their ability to participate, or influence the results of the trial