MYOLOGY. 51 



MUSCLES OF FACE. 



ORBICULARIS ORIS. 



Origin. No bone attachment; confounded with buccinator 

 and other muscles in vicinity. 

 Insertion. About oral orifice. 

 Action To close oral orifice. 

 Nerve. Facial. 



BUCCINATOR. 



Origin. Maxillary tuberosity, above posterior three molar 

 teeth of superior maxilla and from interior maxilla, behind last 

 molar. 



Insertion. Into orbicularis. 



Action. Compresses cheeks. 



Nerve. Buccal, from fifth. 



ZYGOMATICO-LABIALIS. 



Origin. From outer surface of masseteric fascia. 

 Insertion. On surface of buccinator. 

 Action. Retraction of lips. 

 Nerve. Facial. 



LACHRYMO-LABIAL. 



Origin. Outer surface of lachrymal and malar bones. 

 Insertion. Into buccinator fascia. 

 Action. To corrugate skin of lower lid. 

 Nerve. Facial. 



SUPER-NASO-LABIALIS. 



(Levator labii superioris et alceque nasi of man.) 



Origin. Frontal and nasal bones. 



Insertion. Anterior division into external wing of nose and 

 buccinator, posterior into angle of lips; between divisions passes 

 the super-maxillo-labialis magnus. 



Action. Raises wing of nose and upper lip. 



Nerve. Facial. 



SUPER-MAXILLO-LABIALIS . 



Origin. Outer surface of super-maxillary and malar bones. 

 Insertion. With opposite into fascia of upper lip. 

 Action. Raises upper lip, or singly carries it to one side. 

 Nerve. Facial. 



