Cerebrum. 



101 



441. Horizontal Section of the Cerebrum, 



with partly opened Lateral Ventricles. 2 / 3 natural size. 



The Corpus cattosum s. Commissura maxima, connects the two hemi- 

 spheres of the cerebrum, its white substance being continuous with the 

 internal medullary matter of both hemispheres 5 this large white medul- 

 lary mass, surrounded by the margin of grey matter, is known as the 

 Tegmentum ventriculorum s. Centrum semiovale Vieussenii. Along the middle of the 

 upper surface of the Corpus callosum is a longitudinal furrow, Raphe superior 

 corporis callosi, which is bounded by two, slightly elevated bands, the Striae 

 longitudinales Lancisii, and crossed by transverse furrows, Chordae transversales 

 Willisii. Its anterior border curves downwards and backwards to the Tuber 

 cinereum and Corpora mamillaria at the base of the brain; in its course, 

 it forms a distinct bend, the Genu corporis callosi; posteriorly, the Corpus 



callosum forms a thick rounded fold, the Splenium s. Tuber corporis callosi. 



U* 



