MUSCLES OF THE MOUTH AND LIPS. 



307 



viz. three above, three below, three outwards, and the common 

 muscle surrounds the mouth. 

 The three above are, 



1. Levator Anguli Oris, 



Arises, thin and fleshy, 

 from the hollow of the 

 superior maxillary bone, 

 between the root of the 

 socket of the first dens 

 molaris and the foramen 

 infra orbitarium. 



Inserted into the an- 

 gle of the mouth and 

 under lip, where it joins 

 with its antagonist. 



Use. To draw the cor- 

 ner of the mouth up- 

 wards, and make that 

 part of the cheek oppo- 

 site to the chin promi- 

 nent, as in smiling. 



Fig. 77 * 



2. Levator Labii Superioris Alaque Nasi, 



Arises by two distinct origins : the first broad and fleshy, 

 from the external part of the orbitar process of the superior 

 maxillary bone which forms the lower part of the orbit, imme- 



* g, Occipito-frontalis. I, Levator labii superioris alaeque nasi. I, Levator 

 anguli oris. n, Compressor naris. o, Orbicularis palpebrarum ; the external 

 palpebral ligament, seen on the right side, extending to the ear. 3 3, Zygoma- 

 ticus major, and minor. 4, Orbicularis oris, with the slip to the lower part of 

 the septum of the nose, called by Albinus, nasalis labii superioris. 5, Masseter. 

 t, Depressor anguli oris. s s, Sternal and clavicular portions of the sterno- 

 cleido-mastoid. u, Trapezius seen at its upper part. 6, Sterno-hyoid. 7, 

 Sterno-thyroid. 8, Omo-hyoid. 9, Scalenus anticus. 10, Scalenus medius. 



