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PHYSIOLOGY OF CENTRAL NERVOUS SYSTEM. 



ing therefrom, and the results obtained were further extended by 

 careful autopsies upon human beings in whom paralyses of various 

 kinds and sensory defects were associated with more or less definite 

 lesions of the cerebrum. The first outcome of this work was to 

 lead to an extreme view of localization of function in the brain, 

 in which the different motor and sensory areas were definitely 

 circumscribed and separated one from the other, making the cere- 

 brum a plurality of organs, to use Gall's term. The more recent 



Fig. 82. Diagram representing the probable location of the chief motor and sensory 

 areas of the cerebral cortex in man : A, Lateral surface ; B, mesial surface. (From Schd/er.) 



work has tended to modify these extreme views of localization and 

 to emphasize the fact that histologically and physiologically the 

 entire cerebrum is connected so intimately, part to part, that, 

 although the different regions mediate different functions, never- 

 theless an injury or defect in one part may influence to some extent 

 the functional value of all other regions in the organ. The general 

 idea of a localization of function has been established definitely, 

 but the modern view is that the cerebrum is composed of a plurality 



