CH. XLVIII.] 



MOTOR AREAS. 



6/5 



application to the human brain, to which we now pass. The 

 following maps of the human brain were prepared from data 

 partly derived from the examination of the monkey's brain, and 

 partly from the post-mortem examination of human brains in cases 

 of brain disease. Fig. 500 shows the outer surface of the right 



F R ONJA L 



Fig. 500. Right cerebral hemisphere, outer surface. 



cerebral hemisphere with the names of the principal convolu- 

 tions and fissures inserted. Fig. 501 gives the corresponding 

 surface of the left hemisphere with the principal motor and 



Fig. 501. Left cerebral hemisphere, outer surface. 



sensory areas marked. Fig. 502 shows the mesial surface of the 

 right hemisphere with the names of the convolutions and fissures. 

 Fig. 503 gives the corresponding surface of the left hemisphere 

 with the functional areas marked. 



Motor areas of the Human Brain. Roughly, these occupy 

 the convolutions around the fissure of Rolando, and turn over the 

 edge of the hemisphere into the marginal convolution of the mesial 

 surface ; from below, up and backwards, we have the areas for 



x x 2 



