This document discusses the primary effects of central nervous system trauma. It outlines the mechanisms and types of traumatic brain injury in adults and pediatrics. It describes the clinical grading of traumatic brain injuries and imaging techniques used to diagnose them such as CT scans and MRI. The primary effects of traumatic brain injury are listed as fractures, extra-axial hemorrhages, intra-axial injuries, and associated injuries like cervical spine injuries. Specific findings on imaging like pneumocephalus, subdural hematomas, and shaken baby syndrome are also discussed.