Clinical Research Directory

Inclusion Criteria: * 14-65 years old * Non-penetrating brain injury * ICP monitor or * Healthy volunteer or The orthopedic injury cohort will include patients admitted to the ED able to provide informed consent with the following: 1. Fracture confirmed radiographically 2. No head trauma 3. No other known inflammatory process or infection 4. No history of neurological or psychiatric disorders or alcohol or drug dependency. or The mild TBI patients will be defined as those experiencing, 1. Non-penetrating head trauma manifesting one or more of the following: * Loss of consciousness * Post-traumatic amnesia * Altered mental status * Focal neurologic deficits, seizure 2. GCS\> 12 3. No abnormalities on CT other than contusion 4. No operative Lesions 5. Length of hospital stay \< 48 hrs 6. No other known inflammatory process or infection 7. No history of neurological or psychiatric disorders or alcohol or drug dependency Exclusion Criteria: * Inability to obtain informed consent