A Traumatic Brain Injury (TBI) is defined by the Mayo Clinic as a brain injury that results from a violent blow or jolt to the head or body. TBI is a common injury associated with contact sports such as hockey, football, lacrosse, and rugby. It can also be caused by an object that penetrates brain tissue. Many symptoms can result from a TBI. One symptom category is Cognitive and Mental. This category includes memory or concentration problems, mood changes or mood swings, and feeling depressed...