MAIN OUTCOME MEASURES: the rehabilitation time of facial expression muscle function was observed and the dynamic changes of conduction velocity of facial nerve were assayed.

主要观察指标：观察面部表情肌功能恢复的时间，检测面神经传导速度的动态变化。

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Results: The incidence of TD was 26.78%. The predilection site is the tongue, lip and mouth, jaw, upper limb, lower limb, facial expression muscle, neck shoulder buttocks in turn.

结果：TD发生率26.78%，好发部位依次为舌部、唇部和口周部、颌部、上肢、下肢、面部表情肌、颈、肩、臀。

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Each time we use a facial muscle, a groove forms beneath the surface of the skin, which is why we see lines form with each facial expression.

每当你使用面部肌肉的时候，皮肤下就会形成一道凹槽，这就是你作表情的时候，脸部出现线条的原因。

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