I i REBR \l. LOCALIZATION 



847 



very small part of 1 1 1 « - superficial gray matter. They extend also into 

 the fissure of liolando and the other fissures, and thi at of the 



citable area which is thus buried away in the fissures may d that 



on the free surface of the hemispheres. 



It will be noted that there are two centers for tin movements of tht 

 eyes, one in the frontal lobe isolated from the motor area, and the 

 other at the tip of the occipital lobe. The former is the motor center 

 for the conjugated movements of the two eyeballs, wl • the latter 



functionates in association with the so-called visual center, which re- 

 ceives the visual impressions and transmits them to other parts of the 



Anui & Vagina Sulcus centralis 

 Toes i 

 Ankle 

 Knee. 



Abdomen 

 cnest 



Shoulder--, 



Elbow 

 Wrist 



YES 



Fingers 

 & thumb. 



Closure 

 of jaw 



Opening 

 of jaw 



Vocal cords 



Sulcus centralis 



Mastication 



Pig 219. i 'Mi. r i ; ii nf the chim; i enters, 



trie stimulation ;it the parts indicated 

 cle groups. Sherrington.) 



brain to be interpreted and cm-related. Excitation of the center for 

 eye movements in the frontal lobe, say. of the right Bide, causes con- 

 jugate deviation of both eyes tn the opposite side, that is, to the l< 



and it can readily be shown that this movement of the eyeballs is the 



result of reciprocal innervation of the extraocular muscles 314). 



Even at the risk of repetition we will again describe the fundamental 

 experiment that demonstrates this. When the i a in the ah 



experiment, move to the left, it means that the internal rectus <>f the 

 righl eye and the external rectus of the left ting, when 



the external rectus of the former and the internal rectus 



