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University of California Puhlications in Anatomy [Vol. 2 



Fig. 51, Experiment II. The lesion (L) is reduced here to a series of small 

 foci in the internal capsule and to two larger destructions of the hypothalamus. 

 Of the external geniculate body (Cffl) the internal segment is destroyed without 

 visible alteration of its middle and external segments. In the thalamus (Th) 

 strong bundles of the incoming fillet are degenerated; their courses are chiefly 

 parallel to one another and to the outer contour of the thalamus. Somatic sensory 

 radiation (sr) reduced in size shows the characteristic appearance of a pine tree; 

 it enters the superior parietal convolution (PS), some of its fibers forming the 

 cingulum, others especially its ventral bundles along the putamen and through 

 the latter nucleus reach the upper corner of the Sylvian fossa (FS) where the 

 transverse temporal gyms (Ttr) merges with the rest of the insular cortex. The 

 auditory radiation («r) visible immediately above the external geniculate body, 

 penetrates through the ventral putamen and into the superior temporal convolu- 

 tion (Ti) where its fibers enter mainly the auditory "nuclear zone" in the trans- 

 verse gyrus (Ttr). 



