746 



HUMAN ANATOxMY. 



Ligaticni. — The skin, superficial fascia, and some fibres of the attrahens aurem 

 muscle are divided for an inch on a vertical line between the tragus and the condyle 

 of the mandible, a little nearer the latter. The artery will be found closely bound by 

 connective-tissue bands to the temporal aponeurosis. 



THE INTERNAL CAROTID ARTERY. 



The internal carotid (Figs. 693, 695) is the second terminal branch of the com- 

 mon carotid, from which it arises on a level with the upper border of the thyroid 



Fjg. 695. 



Branch of left middle 



meningeal artery' 



Posterior cerebral 



arteries 



Branch of left middle 



meningeal 



Basilar artery' 



Posterior inferior 



cerebellar artery' 



Left vertebral artery 

 Right vertebral artery 



Atla: 



Arteria princeps cervicis 



Axis 



Left complexus 



Deep cervical artery 



Vertebral artery 

 Transverse process of 



I. thoracic vertebra 



I. rib 

 Superior intercostal artery 



Branch to II. intercostal space 



II. rib 

 I. aortic intercostal 



II. aortic intercostal 



Middle cerebral artery 



Anterior cerebral artery 



Anterior clinoid process 



Middle fossa of skull 

 Int. carotid, cav. portion 

 Sup. maxilla, malar process 

 nt. carotid, petrous portior 



Internal maxillary artery 

 Eustachian tube 



Transverse process of atlas 

 Sup. constictor of pharynx 

 - Int. carotid, cervical portion 

 Ascending pharyngeal 

 Stylo-glossus 

 Stj lo-pharyngeus 



External carotid artery 

 Stylo-hyoid muscle, cut 



I^ingual artery 

 Superior thyroid artery 

 Thyro-hyoid muscle 

 Thyroid cartilage 



Inferior constrictor of pharynx 



Common carotid artery 



Subclavian artery 

 Innominate artery 



Internal mammary artery 



Deep dissection, showing internal carotid, vertebral and superior intercostal arteries. 



cartilage. In \\\^ first or cervical portion of its course it lies upon the outer side of the 

 external carotid, but, as it passes upward, it comes to lie behind and then internal 

 to that vessel, from which it is separated by the stylo-hyoid, digastric, and stylo- 

 pharyngeus muscles. It passes almost vertically up the neck to the entrance to the 

 carotid canal, resting posteriorly on the prevertebral fascia covering the rectus capitis 



