minor, and levator labii superioris alaeque nasi elevate the upper lip; contraction of the depressor labii inferioris depress the lower lip.

 
  • 提上唇肌、颧肌、提鼻翼肌的收缩动作会牵动上唇,使之往上移动,而降下唇肌则掌管下唇的收缩及下拉。
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