Traumatic Brain Injury
A disruption of normal brain function caused by either a violent blow or jolt to the head or a penetrating head injury. A traumatic brain injury, or TBI, can range from mild to severe depending on the location and type of injury sustained. A mild TBI may have short-term effects on brain cells while a severe TBI can lead to bruising or bleeding of the brain, torn brain tissue, brain damage, and in some cases death. Symptoms of a TBI can sometimes take days or weeks to appear.