MOTOR FUNCTIONS OF CEREBRAL CORTEX OF CAT 



223 



immediately overlying motor cells. A second area yielding 

 motor reactions was found under that portion of the cortex in 

 the region extending from the anterior bank of the postlateral 

 fissure outwards and forwards to the superior extremity of the 



TABLE 9 



Summary of results from the stimulation of ihz corona radiata. General distribu- 

 tion of stimulable areas 



Movements of the hind limb 



18 

 21 



26 

 27 

 32 



None 



Close to the under portion of the middle third of corpus callosum, and 



anteriorly under the post-crucial area 

 None 

 None 

 Close to the anterior third of the corpus callosum 



Movements of the fore limb 



18 

 21 



26 

 27 

 32 



None 



Close to the middle third of the corpus, and under all of the surface 



motor area 



Und?r the surface area about the crucial sulcus 

 Same 

 Under the post crucial area 



Movements of the head and neck 



18 

 21 



26 

 27 

 32 



None 



Close to the middle third of the corpus, and along the outer margin of 



the posterior one-third of the exposed field 



Close to the under surface of all the corpus and under the crucial area 

 Under the inner part of the anterior section of the motor area 

 Under the inner part of the motor area 



Movements of respiration 



18 

 21 



26 

 27 



32 



Inspiratory: 

 None 

 A few points near the middle 



third of corpus 

 None 

 Under the anterior portion of 



the motor field 

 Above the posterior one-third 



of corpus 



Expiratory: 

 None 

 Numerous points opposite the 



middle third of the corpus 

 None 

 None 



Above the posterior one-third of 

 corpus 



