THE STRUCTURES AT THE BASE OF THE BRAIN. 



87 



divisions (the globus pallidus). From the putamcn and from the 

 nucleus caudatus fibres arise which pass through both the inner 

 divisions and emerge from the base and apex of the nucleus 

 lentiformis. You will remember from the second lecture that 

 the nucleus caudatus and the putamen are genetically related to 



FIG. 50. 



Diagram of the course of fibres from the internal capsule into the critsta. (Modified 



from Wernicke.) 



i-l, Pedune. erebri. Stirnlapp^a. Frontal 1be. 



Hint SrhtnJcfl </. Capsel, Post, brxncb ef Vurdere.r Ktlienltel >l. Capsel, Anterior branch 



eap*l*. of CM*" 1 *- 



Pyramid*, elf.. Pyramid*, ete. Zur Briieke, To the ponj. 



the cortex. Now you see that they also give off fibres just as 

 does the latter. 



Besides these fibres, others pass from the cortex to the len- 

 ticular nucleus. They are fibres from the tegmental radiation. 

 These emerge from the internal capsule along the whole inner 

 border (see Fig. 51) and pass into the two inner divisions. 



