THE MUSCULAR SYSTEM. 135 



NASAL REGION. 



PYRAMIDALIS NASI.- Origin., from the occipito-frontalis ; 

 insertion, into the compressor nasi; action, lowers the inner 

 angle of the eyebrows; nerve, facial. 



LEVATOR LABII SUPERIORIS AL^EQUE NASI. Origin, nasal 

 process of superior maxilla; insertion, the ala of the nose and 

 upper lip, Mending with the levator labii oris proprius and or- 

 bicularis; action, dilates the nostril and elevates the upper lip; 

 nerve, facial. 



DILATOR NARIS POSTERIOR. Origin, nasal notch of superior 

 maxilla; insertion, into skin at the margin of the nostril. 



DILATOR NARIS ANTERIOR. Origin, from cartilage of the 

 ala ; insertion, into the skin of nose ; action, dilates the nostrils ; 

 nerve, facial. 



COMPRESSOR NASI. Origin, superior maxilla, near the in- 

 cisive fossa; insertion, into fibro-cartilage of the nose, continuous 

 with the pyramidalis nasi aponeurosis and its fellow; action, 

 dilates the nostril ; nerve, facial. 



COMPRESSOR NARIUM MINOR. Origin, from alar cartilage; 

 insertion, into the skin of the end of the nose; action, dilates the 

 nostril; nerve, facial. 



DEPRESSOR &LM NASI. Origin, incisive fossa of superior 

 maxilla ; insertion, into the ala of the nose ; action, contracts the 

 nostril; nerve, facial. 



MAXILLARY REGION. 



LEVATOR LABII SUPERIORIS (PROPRIUS). Origin, above in- 

 fraorbital foramen to malar and superior maxilla ; insertion, into 

 the upper lip ; action, elevates the upper lip ; nerve, facial. 



LEVATOR ANGULI ORIS. Origin, from canine fossa; inser- 

 tion, into the angle of the mouth, blending the depressor anguli 

 oris, orbicularis, and zygomatici; action, draws the angle inward 

 and raises it; nerve, facial. 



ZYGOMATICUS MAJOR. Origin, from malar bone ; insertion, 

 into angle of mouth, blending with depressor anguli oris and 

 orbicularis. 



/YGOMATICUS MINOR. Origin, from malar bone; insertion, 

 at the angle of the mouth, blending with the levator superioris ; 

 action, draws the lip outward and upward; nerve, facial. 



LEVATOR LABII INFERIORIS. Origin, from incisive fossa of 

 lower jaw; insertion, into the skin of the chin; action, raises the 

 lower lip; nerve, facial. 



