What is a Traumatic Brain Injury? According to the National Institute of Neurological Disorders and Stroke, a traumatic brain injury "occurs when a sudden trauma causes damage to the brain." The severity of a TBI is typically classified as mild, moderate, or severe. Even a mild TBI, however, can result in long-lasting symptoms such as headaches, vision problems, trouble with concentrating or paying attention, fatigue, and confusion.
The National Association of State Head Injury Administrators website has several tools to help assess whether a TBI has occurred. The HELPS Brain Injury Screening Tool on their site is particularly helpful for evaluating adults.