This document provides an overview of traumatic brain injury (TBI), including: 1) It defines TBI and outlines primary and secondary brain injury mechanisms. Common causes include motor vehicle accidents, falls, and assaults. 2) It discusses evaluation and treatment, including importance of preventing hypotension and hypoxia. Neuroimaging with CT is important for diagnosis and prognosis. 3) Management of elevated intracranial pressure is also covered, including osmotherapy, sedation, cerebral perfusion pressure maintenance, temperature control, and avoiding hypocapnia or steroids.