574 



WILL AND 



(6.) Centre for the movements of the hand and forearm in which 

 the biceps is particularly engaged (viz., supination of the hand and 

 flexion of the forearm) near middle of ascending frontal, opposite 

 posterior extremity of middle frontal convolution. 



(7 and 8.) Centres for the elevators and depressors of the angle 

 of the mouth in lower end of ascending frontal convolution. 



(9 and 10), included together in one, is said to be the centre for 

 the movements of the lips and tongue, as in articulation in 



posterior extremity of the 

 lower or third frontal con- 

 volution (' Broca's convolu- 

 tion '). 



(11.) Centre for retrac- 

 tion of angle of mouth in 

 supra - marginal convolu- 

 tion, near lower end of 

 ascending parietal. 



(12.) Centre for lateral 

 movements of the head and 

 eyes, with elevation of the 

 eyelids and dilatation of 

 the pupil (attitude of 'atten- 

 tion ') in posterior parts 

 of upper and middle frontal 

 convolutions. 



(a, b, c, d.) Centres for 

 movements of the hand and 

 wrist in the ascending 

 parietal convolution. 

 FIG. 183. Upper aspect of Monkey's Brain, The relative position ot % 

 showing the relative positions of some of the these supposed ' motor cen- 

 so-called 'Motor Centres,' in the left Cerebral , . -, , , ^* + v rt 



Hemisphere. (Ferrier.) For references see Text, tres m regard to t WO of the 

 and also Fig. 172. m ost important alleged' sen - 



sory centres ' is also shown 



in Fig. 182, in which the circles 13 and 13' indicate what is regarded 

 by Ferrier as the Visual Centre (in the supra-marginal lolule and 

 the angular gyrus), whilst the circles 14, 14 indicate the situation 

 of the' Auditory Centre (in the upper temporal convolution). The 

 centres of Touch, Smell, and Taste are, as we have previously 

 mentioned (pp. 535-540), believed to be located in convolutions on 

 the inner aspect and tip of the Temporal Lobe. 



