THE MAMMALIAN NERVOUS SYSTEM 97 



expose these connections must be deferred until after the removal 

 of the cerebral hemisphere. 



114. Examine the surface of the human cerebral hemisphere 

 and locate the lobes and the fissures and gyri given in the follow- 

 ing list. The following references will be useful in identifying 

 these parts: Cunningham ('15), Figs. 581, 582, pp. 654, 655, 

 Fig. 585, p. 658, Fig. 589, p. 661; Herrick ('15>, Figs. 52. 

 53, 54, 120; Morris ('14), Figs. 675-679; Piersol ('13), Figs. 

 984-993, pp. 1138-1152; Spalteholz ('09), Figs. 705-714, pp. 

 637-644; Toldt ('04), Figs. 1191-1197, pp. 775-779. 



lobus frontalis, lobus parietalis, lobus occipitalis, lobus tem- 

 poralis, insula (island of Reil) 



fissura cerebri lateralis (Sylvii) 



sulcus centralis (fissure of Rolando) and sulcus precentralis 



sulci temporalis superior, medius, and inferior 



fissura calcarina and cuneus 



sulcus cinguli and gyrus cinguli 



fissura collateralis 



gyri frontalis superior, medius, and inferior 



operculum insula? (temporal, parietal, frontal, and orbital parts) 



"Broca's convolution" (the opercular part of the left gyrus 

 frontalis inferior) 



gyrus centralis anterior (precentral gyrus) 



gyrus centralis posterior (postcentral gyrus) 



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 

 Kappers ('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 



7 



