Patients are said to suffer from a concussion if they experience an injury caused by a blow or jolt to the head, often due to the body being hit in a manner that cause the head and brain to move rapidly back and forth. Concussions are also often referred to as a type of traumatic brain injury or TBI. Concussion symptoms experienced by patients include headaches, nausea, balance or dizziness, sensitivity to light or sound, confusion and an overall sense of feeling unwell.