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Cerebral contusion, Latin ''contusio cerebri'', a form of traumatic brain injury, is a bruise of the brain tissue.〔 〕 Like bruises in other tissues, cerebral contusion can be associated with multiple microhemorrhages, small blood vessel leaks into brain tissue. Contusion occurs in 20–30% of severe head injuries.〔 〕 A cerebral laceration is a similar injury except that, according to their respective definitions, the pia-arachnoid membranes are torn over the site of injury in laceration and are not torn in contusion.〔 〕〔 〕 The injury can cause a decline in mental function in the long term and in the emergency setting may result in brain herniation, a life-threatening condition in which parts of the brain are squeezed past parts of the skull.〔 Thus treatment aims to prevent dangerous rises in intracranial pressure, the pressure within the skull. Contusions are likely to heal on their own without medical intervention.〔Sanders MJ and McKenna K. 2001. ''Mosby’s Paramedic Textbook'', 2nd revised Ed. Chapter 22, "Head and Facial Trauma." Mosby.〕 ==Signs and symptoms== The symptoms of a cerebral contusion (bruising on the brain) depend on the severity of the injury, ranging from minor to severe. Individuals may experience a headache; confusion; sleepiness; dizziness; loss of consciousness; nausea and vomiting; seizures; and difficulty with coordination and movement. They may also have difficulty with memory, vision, speech, hearing, managing emotions, and thinking.〔 〕 Signs depend on the contusion's location in the brain.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「cerebral contusion」の詳細全文を読む スポンサード リンク
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