THE BRAIN 



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walking and standing upright, and for all motions in which 

 the body must make exact movements. A bird or dog 

 without its cerebellum cannot run or stand, but flutters or 

 rolls about the floor. Yet it is strong and acts all right 

 in other ways. 



232. The cerebrum. The uppermost part of the brain 

 is the cerebrum. It is about four times as large as all the 



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ion. 



Regions of the head and action of the different parts 

 of the brain. 



rest together. Its inside is white matter and is made of 

 nerve threads. Over the white matter is a covering of 

 gray matter which looks as if it were too large and so is 

 folded and puckered. The gray matter has many nerve 

 cells. The mind lives in these nerve cells. The nerves 

 of the white matter join these cells and connect them with 

 the spinal cord and with the nerves of the body. 



