432 BLOOD-VESSELS OF THE HEAD. 



little above the occipital, not Tinfrequently in common with 

 it ; it ascends behind the parotid gland, between the mas- 

 toid process and the meatus auditorius, supplying the in- 

 teguments of the posterior ear and scalp. Some of the 

 branches are seen to pass through the pinna to the anterior 

 surface of the ear. Its only branch having a name, is the 

 stylo-mastoid. This enters the stylo-mastoid foramen, and 

 distributes branches upon the aqueduct of Fallopius and 

 the tympanum. 



The temporal artery (Fig. 120) is one of the terminating 

 branches of the external carotid. It ascends through the 

 substance of the parotid gland, over the root of the zygoma, 

 in front of the meatus auditorius, about an inch and a half 

 above the zygomatic arch, where it terminates by dividing 

 into an anterior and posterior branch. Its branches are 

 the anterior auricular to the anterior part of the pinna. 

 The transverse facial passes horizontally upon the face 

 below the duct of Steno, crossing the masseter muscle to be 

 distributed to the adjacent muscles and integuments, and 

 anastomosing with the facial and infra-orbitar arteries. 

 This artery often arises from the external carotid. The 

 middle temporal passes through the temporal fascia and 

 supplies the temporal muscle. The anterior temporal, one 

 of the terminating branches, goes forward to the os-frontis, 

 supplying the muscles and integuments in this region and 

 anastomosing with its fellow of the opposite side, and with 

 the supra orbital arteries. The posterior temporal, the other 

 terminating branch, proceeds backward and upward, anas-' 

 tomosing with the posterior auricular and occipital arteries. 



The internal maxillary artery (Fig. 121) is the remaining 

 terminal branch of the external carotid. It is the great 

 artery supplying the mouth and the whole of the dental 

 apparatus. 



Dissection. Saw the zygomatic arch through at both 

 ends, and turn it down with the masseter muscle ; divide 

 the tendon of the temporal muscle from its insertion 

 into the coronoid process ; divide the rarnus about its cen- 

 tre and disarticulate. Eemove the jaw with the external 



