THE CEREBRUM 



609 



centers are all rejected. Many published facts support this view though 

 many others are at variance with it. 



Bilateral Representation. Though highly specialized movements, 

 such as those performed by the arms and hands, legs and feet, have their 

 areas of representation on one side of the cerebrum only, and that opposite 

 to the side of the movement, less highly specialized movements, such as the 



Motor and tactile area. 



Parietal association area 



Island of Reil. 



Occipito-temporal 

 association area. 



Auditory area. 



Motor and tactile area. 



Parietal association area 

 (Precuneus). 



Frontal 



association 



area. 



\ 



Olfactory lobe. 

 Olfactory tract. 



Occipito-temporal 

 association area. 



\0lfi 



actory area. 



\ 



Gyrus hippocampus. 



FIG 251. DIAGRAMS TO SHOW THE POSITION AND THE RELATION OF THE ASSOCIATION AND 

 PROJECTION AREAS. THE PROJECTION AREAS ARE DOTTED. (After Flechsig.) 



masticatory, phonatory, respiratory and various trunk movements, which 

 require for their performance the cooperation of muscles on both sides of 

 the body, have their areas of representation on both sides of the cerebrum; 

 the area of either side exciting to action the muscles on both sides of the 

 body. In the case of specialized movements the representation is unilat- 

 eral; in the case of the more general movements the representation is 

 bilateral. 



39 



