LONG-TERM EFFECTS OF CLOSED-HEAD INJURIES IN SPORT

Closed head injury has been defined by several authors, but is not agr eed upon. The incidence of closed head injury in sports is relatively small, but because the effects may be catastrophic it is an important topic. Forces may be applied to the head from different directions, wh ich results in different types of lesions. The anatomical and physiolo gical changes with head injury have been suggested to explain head inj ury outcomes. Effects on intelligence and memory have also been report ed. Posture had been proposed as a model to examine the subtle effects of head injury. Vision, vestibular input, and somatosensory input are all involved in maintenance of posture. The interaction of these sens ory modalities is also pertinent to posture maintenance. Somatosensory input appears to be improperly processed, while vision and vestibular input seem to compensate for lost somatosensation. Attention to regai ning the somatosensory component, rather than waiting for compensation to occur, should be addressed in rehabilitation programmes.