A clot between the outermost membrane of the brain and the skull. This can occur as a result of a blow to the head, for example from a boxing punch or a fall from a bicycle. The blood and fluid can accumulate in and around the clot, pressing on the soft structures of the brain causing brain injury that can rapidly lead to death unless the increase of intracranial pressure is relieved by surgery. The force of impact required to produce an extradural haematoma is generally less than that required to produce unconsciousness. Therefore, sports persons who suffer head injuries are observed carefully, especially if consciousness is lost, and are considered to be at risk until proved otherwise.
Subjects: Sports and Exercise Medicine.