Method XX 13I 



opticus, corpus pineale, and a part, perhaps, of the tela choroidea 

 ventriculi tertii (velum interpositum) . 



What is the relation of the nucleus ruber to the brachium 

 conjunctivum ? To what is the name "substantia nigra" due? 

 What can be said of the distribution of the radix of the N. 

 trigeminus ? What is the relation of the tractus opticus to the 

 colliculus superior? What is the office of the fasciculus longi- 

 tudinalis medialis ? 



The corpus pineale and corpus geniculatum laterale belong 

 to the thalamencephalon. 



{c) Prosencephalon (telencephalon, thalamencephalon, and 

 diencephalon). 



Using fig. 2 as a guide, take frontal sections from the half of 

 the prosencephalon (cerebral hemisphere) detached in II. above. 

 Sections made with a single stroke of a long knife will be best 

 in that their surfaces will be more perfect. In every case study 

 that face of the section which is exposed on the frontal side of 

 the knife. Identify the 'larger bloodvessels occurring in each 

 section. 



Section ij, to pass through the splenium corporis callosi 

 and about the middle of the praecuneus near the ramus sulci 

 cinguli which separates the praecuneus from the lobus para- 

 centralis. The plane may slant slightly toward the posterior 

 region. 



Draw, giving special attention to the appearance and position 

 of the following structures : 



Substantia corticalis (cerebral cortex), substantia alba, corpus 

 callosum (splenium), radiatio corporis callosi, and radiatio 

 occipito-thalamica (optic radiation). 



Sulcus corporis callosi, gyrus and sulcus cinguli, and praecu- 

 neus. 



Sulcus interparietalis, fissura cerebri lateralis (Sylvii), gyri 

 temporales superior, medius, and inferior, and the sulci separat- 

 ing them. 



Cornu posterior ventriculi lateralis, plexus choroideus, calcar 

 avis, hippocampus and gyrus hippocampi, and gyrus fusiformis. 



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