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University of California PvUications in Anatomy C^^ol. 



Fig. 55, Experiment II. Last somatic sensory fibers (sr) in the superior 

 parietal convolution (PS) ; visual radiation (extenial sagittal stratum of the 

 parieto-occipital lobe) taking here the shape of a horse-shoe facing medialward 

 and embracing in its concavity the internal sagittal stratum, the tapetum, the 

 lateral ventricle and the c-alcarine fissure (Fc). The visual radiation can be sub- 

 divided into a dorsal horizontal branch (vr, degenerated in this expei-iment ) , a 

 ventral horizontal branch (rhi) , and into a vertical or perpendicular branch 

 (rvert) connecting both horizontal branches. Both the vertical and the ventral 

 horizontal branches contain only a few scattered degenerated fibers. The visual 

 afferent fibers of the degenerated dorsal horizontal branch (vr) bend in their 

 ascending course occipitalward around the dorsal corner of the lateral ventricle 

 and the tapetum and descend into the upper lip of the calcarine fissure where 

 they reach the striate cortex (marked with a dotted stripe) first appearing m 

 this series. None of the visual fibers deviates toward the non-striate cortex 

 of the hemisphere. They go to a narrow strip of the area striata exclusively. 

 Angular convolution (GA), simian sulcus (SS). 



