BASAL GANGLIA 



575 



terms the following : Fibres from the crura cerebri go directly into the 

 corpora striata in front and into the optic thalami behind. This is 

 the course of the greatest part of the fibres, but some fibres go directly 



Fig. 141'. Horizontal section of the brain, reduced about one-quarter (Dalton). 

 CS, corpus striatum (caudate nucleus) ; LN, lenticular nucleus; OT, optic thalamus. 



through the internal capsule, and thence to the gray matter of the 

 cerebral convolutions. Most of the fibres, however, which form the 

 internal capsule come from the gray matter of the corpora striata 

 and optic thalami and curve outward and upward to go to the gray 

 matter of the hemispheres. As they pass from the internal capsule 



