STUDIES OF THE NERVOUS SYSTEM 



213 



A second method of investigation is by clinical observations and 

 examination, and autopsies. Doctors observe and examine the 



ABSTRACT 

 THINKINQ 



CONCENTRA* 



HeAQT. 

 CIRCULATION.^ 



According to clinical investigation and animal experimentation, the control of certain physical 

 functions is localized in definite areas of the brain. There is considerable investigation at 

 present as to whether there is general control of these functions as well as definite control. 

 The localization of intelligence, including thinking, association, and memory, is still open to 

 discussion. 



symptoms of people that show nervous disorders, and in many 

 cases are able to determine the cause of the trouble. When such 

 patients die and autopsies are performed on the bodies, the doctors 

 can, in some cases, link up the nervous disorder with the part of 

 the nervous system showing disease. For example, if a person 

 had been paral,yzed on the left side of the body, the autopsy will 

 show whether an obstruction, probably in the form of a blood 

 clot, is on or near the part of the brain controlling muscular 

 movements. If a person were blind, the autopsy may show injury 

 to the area of the brain controlling vision. 



Certain scientists, through experimentation and study of normal 

 and of diseased brains, have localized certain areas in the brain. 

 For a time people carried the idea of localization to an extreme. 



