MUSCLES OF THE FACE. 367 



The Zygomaticus Minor, 



Is a small muscle, arising from the fore part of the os make ; 

 it descends obliquely, and is inserted into the upper lip just 

 above the corner of the mouth.* 



Zygomaticus Major, 



Is just on the outside of the last, and is much larger. It 

 arises from the malar bone, externally, at its posterior inferior 

 part, just above the lower eqlge, where this bone contributes to 

 form the zygoma. It passes obliquely downwards to be in- 

 serted into the corner of the mouth, and runs into the depressor 

 anguli oris. 



The last two muscles draw the corner of the mouth towards 

 the cheek bone, or obliquely upwards and outwards, as in 

 smiling. 



The Depressor Labii Superioris et Alee JVasi, 



Is concealed by the orbicularis oris, and the levator labii su- 

 perioris et alae nasi. To get a view of it, the upper lip must 

 be inverted, and the lining membrane of the mouth removed 

 on the side of the frsenurn of the lip. This muscle arises from 

 the inferior part of the upper maxilla in front of the alveolar 

 processes for the dens caninus and the incisores, and is inserted 

 into the side of the ala nasi, and into the contiguous part of the 

 upper lip. 



It depresses the upper lip and the ala nasi.. 



The Depressor Anguli Oris, 



Arises broad and fleshy from the base of the lower jaw or> 

 the side of the chin; being somewhat triangular, its apex is in- 

 serted into the corner of the mouth. 



This muscle draws the corner of the mouth downwards. It 



* Varieties. Frequently it is deficient; sometimes it is a fasciculus of the or- 

 bicularis oculi; sometimes it is double; sometimes it does not reach the corner 

 of the mouth.. 



