28 A MANUAL OF ANATOMY. 



artery, from the inferior or posterior division of the fifth 

 nerve. 



Its course is between the internal lateral ligament and 

 neck of the lower jaw, then between the temporomaxillary 

 articulation and the parotid gland ; issuing from under the 

 gland, it turns upward along with the temporal artery, be- 

 hind which it runs to supply the integument upon the side 

 of the head. 



Its branches are, also, distributed to the temporomaxil- 

 lary articulation, the parotid gland, and the ear (meatusand 

 upper part of the pinna). 



DISSECTION. 



Incision. I. Continue the median incision to the point of the chin, carry- 

 ing it around the wing of the nose and the angle of the mouth. 



2. From the last point extend a cut backward along the lower border, to the 

 angle of the jaw and upward to the lobe of the ear. 



Reflect the flap from before backward. Much care will have to be exer- 

 cised in removing the integument from the face, as it is very thin, especially 

 so over the eyelids, and closely attached to the facial muscles, which are thin, 

 pale, and indistinct. 



Orbicularis Palpebrarum. Fig. 2. 



Origin. The palpebral portion, by means of the internal 

 tarsal ligament (tendo-oculi) from the crest of the nasal 

 process of the superior maxillary bone. 



The orbital portion, from the internal tarsal ligament, the 

 nasal process of the superior maxilla, and the inner portion 

 of the infra-orbital arch. 



Insertion. The palpebral portion, into the external tarsal 

 ligament and by it into the front of the frontal portion of 

 the malar bone. 



The orbital portion surrounds the palpebral or central 

 portion and forms the sphincter muscle of the eyelids, 

 Insertion same as the origin. 



