A concussion is a traumatic brain injury defined as a complex process affecting the brain caused by external mechanical forces. It is caused by force transmitted to the head or body, which causes movement of brain tissue within the skull. The high-speed movement of the brain tissue inside and against the skull causes concussion and is not always caused by a direct impact to the head. It can directly impact any part of the body if the impact is significant enough to transmit force to the head and disturb or increase the brain’s movement within the skull. Whilst most people think head-on collisions and front-on impacts in sports are the most common scenario for a concussion injury- both linear and rotational forces affecting the head or body can cause a concussion. The amount of force required to cause a concussion varies; therefore, you cannot judge the extent of the concussion by the incident itself. Learn more about Physio for Concussion.