556 



I'lIYSlOUHJY 



CHAP. 



Ill the cortex of the frontal lobe (Iriinhaum ami Sherrington, 

 like r>eevor ami Horsley. found a large area completely separated 

 from the motor /one of the Kolandic area, faradisation of which 

 produces conjugate deviation of the eyes. The lower extremity of 

 the occipital lobe, and the region lying arouml the lips of the 

 calcarine tissnre, are excitable to faradisation : conjugate movements 

 of the eyeballs may he also elicited from here. Uriinhaiim ami 



Anus ff 



Abdomen 



Chest 



&r- '..-' 

 EyeUid .- 

 Nose 



Closure 



"*"%& 



VocaM 

 cords. 



Fio. 281. External surface of brain of oranjr. sliowing excitable areas. 

 (Gninbaum and Sherrington.) 



Sherringtou, however, hesitate to include this region with the true 

 motor area represented by the Rolandic area. 



The two figures 281 and 282 give approximately the localisation 

 of the areas for the face, fore-limbs, trunk, and hind-limbs, as well 

 as the differentiation of the excitable points contained in each 

 area. Among these are centres for the special movements of the 

 ears, nostrils, palate (acts of sucking or mastication), vocal cords, 

 muscles of thorax, abdomen, pelvis, and of anal and vaginal orifices. 

 The faradisation of certain points produces not motor but inhibitory 

 effects similar to those described by Sherrington. 



These results of the experiments of Grunbaum and Sherrington 

 on anthropoid apes differ from those observed by Beevor and 



