PLATE IV 



Fig. i.— Left hemisphere of seven months' FlGl 4-— Left hemisphere of a low-grade imbecile ; there 

 foetus, showing the primary fissures. is a § reat failure of development of the parietal 



lobe and the convolutional pattern is very simple. 



Fig. 2. — Left hemisphere of new-born child, 

 full term. 



Fig. 3. — Brain of microcephalic idiot. Notice 

 that the cerebellum is almost entirely un- 

 covered. 



. 1 "\ Assauw 



Gr»l fast? 



ife8JlC?fltfl 



Cu«fi3 



Mi3d!f Assofulion Cptfr? 

 U»* »f lh( Insula 



'■Auditory Onfre 



Gifaf Froebl- 

 AsmcbHoi 



S)WS h. -. 1 

 Olfactory Nerre 



^Cnitre (I S**ll 



CVf ''<" Occpito Temp"* *** 

 FL ECHSIG'S AS SO CIATION CENTRES 



Fig. 5 is a diagram showing the projection and 

 association centres of Flechsig as seen on the 

 external and internal surfaces of the right 

 hemisphere. 



304I 



