The Facial Muscles ZYGOMATICUS MAJOR LAO Mal Malaris NLF Nasolabial fuo 92
The Facial Muscles.RISORIUS Risorius age of people have no risorius at all,while oth ORIGIN The fascia of the cheek overlying the masseter muscle (a nonbony origin). INSERTION The muscular node at the angle only.The nodular platysma,however,is present oris. ACTION Pulls the node,and therefore the an EFFECT The risorius widens the mouth, and backward. PIN- Bu Buccinator Ma Masseter No Node PIN Platysma-noduar portion Rs Risorus
The Facial Muscles BUCCINATOR Buccinator cal (cheek)fat pad lies on the muscle's outer ORIGIN The outer surfaces of the upper and surface. ower aws,just above and below the three a时oe oh ione tha develops several bulged forms. STRUCTURE This relatively deep.quadrilat tion of the buccinator. Ma Zygomaticus majo 95
The Facial Muscles.DEPRESSOR ANGULI ORIS and a deep head arising from able in eng The ACTION Pulls the node (and angle of the ap PIL- DAO Depressor anguli oris 96
The Facial Muscles.DEPRESSOR LABII INFERIORIS action of labial platysma).The depressor labii medial ibers push the chin prominence down INSERTION The skin of the medial portion of the lower lip may develop or ver gun se EXPRESSION Primarily used in speaking. 00r I DAO Me 00 PIL- Me OOrOrbicularis oris PlL.Platysma-labial portion 97