This document discusses traumatic brain injury (TBI). It defines TBI as a blow or jolt to the head that disrupts brain function. It notes that there are approximately 2.8 million TBI-related ER visits annually in the US, with 50 million people living with TBI. Common causes are falls, blunt trauma, and car accidents. Diagnosis involves consciousness tests, imaging, and neuropsychological evaluations. Symptoms range from headaches and dizziness for mild TBI to personality changes and cognitive deficits for moderate or severe TBI. Treatment depends on severity and may include rest, rehabilitation, surgery or medications. The document emphasizes that TBI is underrecognized and misunderstood, negatively impacting recovery, and