308 MUSCLES OF THE FACE. 



diately above the foramen infra-orbitariura ; the second portion 

 arises from the nasal process of the superior maxillary bone, 

 where it joins the os frontis at the inner canthus, descending 

 along the edge of the groove for the lachrymal sac. 



The first and shortest portion is 



Inserted into the upper lip and orbicularis labiorum ; the 

 second and longest, into the upper lip and outer part of the ala 

 nasi. 



Use. To raise the upper lip towards the orbit, and a little 

 outwards ; the second portion serves to draw the skin of the 

 nose upwards and outwards, by which the nostril is dilated. 



3. Depressor Labii Superioris Alceque Nasi, 



Arises, thin and fleshy, from the os maxillare superius, imme- 

 diately above the joining of the gums with the two dentes inci- 

 sores and the dens caninus ; from thence it runs up under part 

 of the levator labii superioris alaeque nasi. 



Inserted into the upper lip and root of the ala nasi. 



Use. To draw the upper lip and ala nasi downwards and 

 backwards. 



The three below are, 



1. Depressor Anguli Oris, 



Arises, broad and fleshy, from the lower edge of the maxilla 

 inferior, at the side of the chin, being firmly connected to that 

 part of the platysma myoides, which runs over the maxilla to 

 the angle of the mouth, to the depressor labii inferioris within, 

 and to the skin and fat without, gradually turning narrower ; 

 and is 



Inserted into the angle of the mouth, joining with the zygo- 

 maticus major and levator anguli oris. 



Use. To pull down the corner of the mouth. 



2. Depressor Labii Inferioris, 



Arises, broad and fleshy, intermixed with fat, from the infe- 



