TBI stands for Traumatic Brain Injury. It is an injury that affects how the brain works and is usually caused by a violent blow or jolt to the head or body, or by a penetrating injury such as from a gunshot

. TBI can result from various causes, including falls, motor vehicle crashes, assaults, and gunshot wounds

. The severity of a TBI can range from a mild concussion to a severe injury that results in coma or death

. TBI is a major cause of death and disability in the United States, affecting people of all ages

. It can lead to a wide range of symptoms and complications, and immediate treatment for someone who has suffered a severe TBI focuses on preventing death and further brain damage