Concussions are a type of internal head injury that causes the temporary loss of normal brain function.

脑震荡是一种闭合性脑损伤，它会引起短暂的脑功能障碍。

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CONCLUSION Patients with history of head injury, eye symptoms or epistaxis should take DSA examination to identify the injury of the internal carotid artery in cavernous sinus segment.

结论对有头颅外伤史伴有眼部症状或鼻出血症状的应及早行DSA造影以明确诊断。

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An internal head injury could have more serious implications because it may result in bleeding or bruising of the brain.

内部头部受伤可能有更严重的影响，因为它可能会导致大脑出血或瘀伤。

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