Traumatic Brain Injury

Traumatic brain injury (TBI) is a type of acquired brain damage caused by external forces such as blows, jolts, or penetrating injuries to the head, resulting in temporary or permanent impairments in cognitive, physical, and psychosocial functions. It is classified by severity—mild (e.g., concussion), moderate, or severe—and can lead to a wide range of outcomes, from minor disabilities with full recovery to long-term impairment or death. Common causes include falls, motor vehicle accidents, and violence, with symptoms varying from headache and confusion to altered consciousness, memory deficits, and behavioral changes. TBI involves both primary injury at the time of impact and secondary injury processes that may develop over time. It remains a leading cause of death and disability in the United States, particularly affecting children and young adults, and requires prompt medical evaluation for proper diagnosis and management.