Acquired brain injury is injury to the brain that occurs after birth. It is not a congenital defect but rather the result of any number of factors. Acquired brain injuries can either be the traumatic or non-traumatic. Traumatic brain injuries are usually the result of a fall or other accident involving the head. Non-traumatic brain injuries can be the result of a stroke, drug use, brain tumors and other medical conditions. Acquired brain injuries can range from mild to severe with the resulting individual effects drastically varying from individual to individual. Because the brain controls every function of the human body, acquired brain injuries can result in changes to the cognitive, physical and social skills of the individual. Speech, body movement and even emotional disorders can occur. Recovery varies from person to person, depending on the extent of the injury and the treatment received. Some people with brain injuries fully recover and show little or no lingering results, while others will live with mild to debilitating effects for the remainder of their lives.