242 



Muscles of the Head. 



Galea aponeurotica 



.nS;^"'f\v5..v~'^. 



JSr. frontalis 



M. procerus 



M. orbicularis 

 oculi 



]sr. zygoniaficus 



Sulcus nasolabialis 



M. iiasalis 

 (pai's transversa) 



Caput zygoniaticum, 



: Caput infraorbit ale , "'.-. I"'*'^'^"' . 



i labu superioris 



Caput angulai'e ' 



287. Muscles of the head and face, vioAved from in front. 



Miisciiliis cpicraiiiiis. Jmii-ih: Ihit, broad. Position : cuvers the roof of the skull. 



J'oskrior jxirl, ticsliy : in. occipitalis (see Fig. 296). Origin: lineae niichae supreniae 

 OSS. occipitalis. Insertion: galea aponeurotica. Action: draws the galea backward. 



Middle portion, tendinoiis: galea aponeurotica, largo flat tendon inserted between 

 ni. occipitalis and ni. frontalis: lodsoly and ninvably uniti'd with thi' jieriosteum, very firuily 

 connected with the cutis. 



Antoior portion, fleshy: m. frontalis (see also Fig. 2S6). Origin: galea aponeurotica. 

 Insertion: slcin of the eyebrows, ossa nasalia (latter portion callinl ni. procerus). Action: 

 draws eyebrows u])ward, wrinkles forehead transversely; moves galea apdueurotioa. 



Innervation : n. facialis. 



31. <|iia(lratus labli superioris (see also Fig. 286). Form: Hat, triangular. Po- 

 sition: lateral from the nose; origins partly covered by ni. orbicularis oculi. Caput angular e. 

 Origin: proc. frontalis maxillae. Insertion: skin of the ala nasi and of the sulcus 

 nasolal)ialis. Cajiut iiifraorhilalc. Origin : margo infraorhitalis. Insertion: sulcus 

 nasolabialis. Caput zygoniaticum. Origin: facies malaris oss. zvgomatici. Insertion: 

 sidcus nasolabialis. Action: draws ala nasi and upper lip outward and upward, Avidens 

 nasal ojieniiig and decjiens the sulcus nasolabialis. Innervation: n. facialis. 



