THE CENTRAL NERVE SYSTEM 



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associated, and impulses conveyed, by contact or 

 contiguity of the axonic terminals of one axone with 

 the cell body or dendrites of another neurone. 



THE CENTRAL NERVE SYSTEM 



The central nerve system or cerebrospinal axis 

 consists of the (1) brain (encephalon) and its cranial 

 nerves and associated ganglia; (2) the spinal cord and 

 its spinal nerves and associated ganglia. 



FIG. 121 



ARTERIA 

 VERTEBRALIS 



LIGAMENTUM 

 DENTICULATUM 



Ventral view of medulla oblongata and upper part of spinal cord. Dura 

 and arachnoid cut along median line and folded aside. A and B are fairly 

 constant velar folds of the arachnoid. (After Key and Retzius.) 



The Spinal Cord. The spinal cord is the portion 

 of the nerve svstem which is connected with the brain 



