OAPSULA INTERNA, cdRPUS STKIATUM, INTERBRAIN-GANGLIA. 265 



the lateral ventricle; that is to say, its anterior horn. Indeed, at several points, 

 the ventricle itself has been opened. 



The white, medullary substance lateral to the ectoventricular gray substance 

 is formed, first of all, by the tracts from the frontal lobe to the anterior limb of the 

 internal capsule. It is approximately the region which is designated "Ad cms ant." 

 This bundle, cut transversely, is then surrounded ventrally, and in part split up and 

 interlaced, by fibers of the corpus callosum and by long association-fibers, which 

 belong to the fasciculus uncinatus. 



Dorsal to it lies the region (indicated by light shading in the illustration) in 

 which the fasciculus arcuatus spreads out. In addition to this there are next, close 



Gyrus cinguli - 



Corpus calloa. 



Stria longitnd. 



Ventrical us lat. 



Septum pellucid. 



Caput nuel. oaud. 



Caps. int. crus ant. "■' 



Rostrum corp. callos. ~ 



Gyrus rectus 



Faac. fronto-ocoip, 



/Region of hypfigloasal 

 \ and speech-imthway 



Piitanien 



Fiss. Sylvii insula) 



Capsulaextv 



Clau3trum 



Regio fuse, uncin. 



Gyri orbitales 



Fig. 171. 



under the cortex, the curved tracts of the short association-pathways. Over the 

 entire area there are disposed numerous fibers, which pass, in part, to the thalamus; 

 in part, have an unknown course. There is probably quite a, number of association- 

 pathways here also. Even in the plane of this section, in specimens hardened in 

 chrome-salts, the clngulum may be met with, cut transversely, just above and below 

 the corpus callosum; and, dorso-mesial to the fibers of the corona radiata passing 

 to the internal capsule, is also met the anterior radiation of the fronto-occipital 

 association- bundle. 



The next section (Fig. 171) is made just behind the genu of the corpus callosum. 

 Dorsally, it passes through the body of the corpus callosum, ventrally it cuts the 



