Contraction of the levetor labii superioris , zygomatic minor, and levator labii superioris alaeque nasi elevate the upp提上唇肌、小颧肌、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。
Contraction of the zygomatic major muscle elevates and retracts the corner of the mouth, while the depressor labii infer大颧肌控制嘴角的延展和收缩动作，降鼻翼肌则负责使上下唇上下移动。