THE NERVOUS SYSTEM 



169 



fibres run ; and the caudate nucleus, the main part of which 

 lies in front of the other two (Fig. 91). 



FIG. 92. Diagram of the Arrangement of Cells in a typical part of the Cerebral 

 Cortex (see p. 168). (After RAMON Y CAJAL.) 



The fibres, above these nuclei, spread out to form the 



FIG. 93. Diagram of Collateral Connections of different parts of the Cerebral 

 Cortex, a, &, c, Pyramidal Cells of the Cortex, all connected by Collateral 

 Branches with other parts of the Cortex in the same and in the opposite 

 hemisphere, a gives off the Pyramidal Fibres to the Cord. (After RAMON Y 

 CAJAL.) 



corona radiata and enter a crust of grey matter, the cortex 

 cerebri, which covers over the cerebrum, and which in the 



