n8 



THE NERVOUS SYSTEM 



The Cerebral Arteries. Four large arteries enter the 

 cranial cavity to supply the brain, and in the neighbourhood 



FIG. 58. Interior of the Skull after the removal of the Brain, showing the 

 points of exit of the twelve cerebral nerves. 



of the interpeduncular fossa they become interconnected so as 

 to form the arterial circle (of Willis]. 



The Internal Carotid Artery enters the skull through a 

 special canal in the petrous temporal and passes forwards in 



