IMYOLOGY. 51 



MUSCLES OF FACE. 



ORBICULARIS ORIS. 



Origin, — No bone attachment ; confounded with buccinator 

 and other muscles in vicinity. 

 Inse?'tion. — x\bout oral orifice. 

 Action — To close oral orifice. 

 Ner-ve. — Facial. 



BUCCINATOR. 



Origin. — Maxillary tuberosity, above posterior three molar 

 teeth of superior maxilla and from inferior 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 superior is et alceqiie nasi of man.) 



Origijt. — 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 hp. 

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

 Nerve. — Facial, 



