CONÂCUSÂSION: An inury to the brain that results in temÂpoÂrary loss of norÂmal brain funcÂtion. It is usuÂally caused by a blow to the head. Cuts or bruises may be present on the head or face, but in many cases there are no signs of trauma. Many peoÂple assume that conÂcusÂsions involve a loss of conÂsciousÂness, but that is not true. In most cases, a perÂson with a conÂcusÂsion never losses consciousness.
Source: AmerÂiÂcan AssoÂciÂaÂtion of NeuÂroÂlogÂiÂcal SurÂgeons
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