ARTERIES OF THE BRAIN. 135 



side of the inferior maxillary, close with the retractor labii 

 inferioris muscle. It also supplies the under lip ; within 

 which it unites with its fellow of the opposite side. 



It gives rise to 



The buccinator arteries. 



A branch, which runs to the angle of the mouth ; and 

 there divides into the superior and inferior coronary arteries, 

 which nourish the upper and the under lips {Fig 9 . e) . 



The facial artery (Fig 9 . h) ascends in front of the mas- 

 seter ; having reached the termination of which, it divides 

 and expends itself on the front of the face. 



It generally sends blood to the external masseter muscle ; 

 buccal twigs; and the superior labial {Fig 9 .f,f); and a 

 branch which runs to the false nostril, and to the upper hp 

 {Fig 9 . i) ; all its branches freely join those of neighbouring 

 arteries. 



The ramus anastomoticus {Fig 12.8) proceeds upwards, 

 underneath the parotid gland ; below the styloid process it 

 turns and gets under the wing of the atlas ; where it unites 

 with the vertebral. It gives off 



The occipital {Fig 12 . 9), which ascends to the crest of 

 the occiput. This last sends off a long twig, which goes 

 through the foramen lacerum basis cranii to the dura mater, 

 as w^ell as nurtures other parts. 



The i7iter7ial carotid {Fig 12 . 10, 10 ; /(/. 1 1. 6) crosses 

 the extremity of the os hyoides, and by a tortuous course 

 reaches the cranium, through the foramen lacerum basis 

 cranii. 



ARTERIES OF THE BRAIN. 



The vertebrals, upon entering the cranium {Plate V. Fig 

 2 . 1,1), unite with the inferior spinal artery {Plate V. Fig 

 2.2); and ultimately form one trunk, called the basilar 

 {Plate Y. Fig 3) ; which, when formed, gives off branches 

 right and left to the cerebellum (PZ«ie V. Fig 2. 4). Having 

 then proceeded to the front of the pons varoli the basilar is 

 divided into three trunks, by giving off the right and left com- 

 municating arteries of the basilar {Plate V. Fig 2 . 6, 6) ; 

 which join the transverse posterior {Plate V. Fig 2 . a), 

 within the cranium ; where for the present we must leave 

 them. The middle communicating artery {Plate V. Fig 



