脑震荡的症状是什么样子的？
为了进行对照，还有21名最近同样经历过爆炸，但没有脑震荡症状的军人也进行了弥散张量成像扫描。
R. I. For comparison, 21 control subjects were also scanned — men exposed to blasts recently but with no symptoms of concussion.
脑震荡的其他症状有胃痛、痛，肌肉无力，视力下降。
Other signs of concussion are stomach and head pain, muscle weakness and a loss in sharpness of vision.
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