THE MAMMALIAN NERVOUS SYSTEM 101 



gyri temporalis superior, medius, and inferior 

 gyrus hippocampi and uncus, fissura hippocampi 



115. The cerebral hemisphere of the sheep. Note the ar- 

 rangement of gyri and sulci in the cerebral hemisphere of the 

 sheep and locate the motor area of the cortex (see Fig. 9, 

 Simpson and King ('11), and King ('11)). Compare this 

 arrangement with that of the human brain and note the 

 differences. On the comparative anatomy of the sulci, see 

 Rappers ('13). 



116. Cortical localization. With the aid of the gyri and 

 sulci just listed locate each of the projection centers and as- 

 sociation areas on your specimen. The following references 

 may be consulted: Barker ('01), Fig. 657, p. 1037; Barker ('16), 

 Fig. 588, p. 436; Cunningham ('15), Fig. 588, p. 660, Fig. 591, 

 p. 663, also see references under Section 114; Gushing ('08) and 

 ('09); Edinger ('93) ; Edinger and Fischer ('13); Flechsig ('96); 

 Gray ('18), Figs. 756, 757; Herrick ('18), Figs. 130, 131, 135, 

 136; Horsley ('09); Howell ('18), Figs. 86-88, pp. 195-197, 

 Fig. 97, p. 222, Figs. 98-101, pp. 227, 228, also discussions in 

 Chap. IX, pp. 192-201, and Chap. X; Leyton and Sherring- 

 ton ('17); Monakow ('14); Morris ('14), Fig. 703, p. 892, 

 Fig. 704, p. 894; Rauber-Kopsch ('12), Figs. 250, 251, pp. 253, 

 254; Starling ('15), 'pp. 434-457; Stewart ('18), pp. 947-975; 

 Villiger ('12), Figs. 118-122, and discussion pp. 123-130. 



117. Gross structure of the cerebral cortex. Remove a small 

 rectangular block containing about one square centimeter of 

 cortex from each of the following centers of the human cerebral 

 cortex: visual, auditory, tactile, motor, prefrontal. Cut each 

 block so as to exhibit a section through the cortex strictly 

 perpendicular to the surface and observe with a lens the details 

 of the lamination of the gray and white substance within the 

 cortex. These distinctions are visible only in well-preserved 

 material; cf. Cunningham ('15), pp. 644-647; Herrick ('18), 

 Fig. 122; Quain ('09), Vol. Ill, Pt. I, pp. 372, 373; and Elliot 

 Smith ('07). 



118. Microscopic structure of the cerebral cortex. Study the 

 microscopic sections of the cerebral cortex supplied and note 

 particularly the differences in the lamination of the cells and 



