Method XX 137 



{e) General connecting pathways. 



1. "Projection fibers": substantia corticalis, corona radiata, 

 capsula interna, and pedunculi cerebri. 



2. Commissural fibers : corpus callosum, commissura ante- 

 rior passing through centrum semiovale to substantia corticalis. 



3. Association fibers : (a) Long paths : cingulum (in gyrus 

 cinguli); fasciculus longitudinalis superior, connecting lobus 

 frontalis with lobus occipitalis; and fasciculus longitudinalis infe- 

 rior, connecting lobus temporalis with lobus occipitalis. '(/3) Short 

 paths : fasciculus uncinatus, connecting uncus with lobus fron- 

 talis ; fornix, connecting hippocampus with corpus mamillare, 

 substantia perforata anterior and vicinity ; and fibrae arcuatae 

 cerebri (ffibrae propriae) connecting neighboring gyri. 



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