306 



ELEMENTS OF PHYSIOLOGY 



C. Motor. By 

 which we move 



B. Sensory. By 

 which we feel. 



little Brain or 

 Cerebellum. 



FIG. 204. The Area A has not 

 been as definitely located as the 

 Areas B and C. 



its back, swims when 

 thrown into water, and 

 when placed on a board 

 that is slowly tilted, it 

 will preserve its balance 

 by climbing to the top. 

 These actions are reflex 



Marrow 

 edulla. 



A. Intellectual. rnrir^r1 

 By which we think "lOVea 



some more ex- 

 tensive powers 

 than a warm- 

 blooded ani- 

 mal. It starts 

 to hopping 

 when touched, 

 avoids obsta- 

 cles in its path, 

 recovers its 

 usual position 

 when placed on 



FIG. 206. View of One Cerebral Hemisphere from 

 between the .Hemispheres, showing Motor and 

 Sensory Centres. 



FIG. 205. Motor and Sensory 

 Centers. Most Centers occur 

 in Both Hemispheres, and if 

 One is injured, the Other will 

 continue to work. 



but of a higher or- 

 der than a simple re- 

 flex act. The reason 

 the frog continues 

 hopping after being 



