THE NERVOUS SYSTEM 



503 



Striate body is directly connected with the olfactory organ. A large 

 fiber tract, the ventral peduncle, connects the striatum with the thalamus. 



,FROt^AL POLE 



SUPERIOR FRONTAL GYRUS 



MIDDLE FRONTAL GYRUS 



FRONTAL LOBE 



-CENTRAL SULCUS 



ANGULAR GYRUS 



C-PARIETO-OCCIPITAL FISSURE 



OCCIPITAL POut' \L0NGITUD1NAL FISSURE 



Fig. 418. — The human brain in dorsal aspect. (Redrawn after Sobotta.) 



In reptiles, the striatum becomes so greatly enlarged as nearly to 

 obliterate the ventricle of the hemisphere. Both paleostriatum and 



INFERIOR FRONTAL GYRUS^ 



FRONTAL LOBE 



FRONTAL POLE 

 ORBITAL GYRI 



/ANTERIOR CENTRAL GYRUS 

 'CENTRAL SULCUS 



•POSTERIOR CENTRAL GYRUS 

 lETAL LOBE 



SUPRAMARGINAL GYRUS 



- ANGULAR' GYROS 



FISSURE OF SYLVIUS 



SUPERIOR TEMPORAL GWUS 



MIDDLE TEMPORAL GYRUS 



TEMPORAL LOBE 



PARIETO- 



-OCCIPITAL 



FISSURE 



OCCIPITAL LOBE 

 'OCCIPITAL POLE 



TEMPORAL POLE' "^TnFERIOR TEMPORAL GYRUS 



Fig. 419. — Human brain in left lateral aspect. (Redrawn after Sobotta.) 



epistriatum persist, but an archistriatum is added dorsal and lateral 

 to the paleostriatum. Anterior to the archistriatum a neostriatum 



