THE CEREBRUM 



267 



FIG. 86. Side view of the brain of man, with the areas of the cerebral 

 convolutions according to Ferrier. (Brubaker.) 



The figures are constructed by marking on the brain of man, in their respective 

 situations, the areas of the brain of the monkey as determined by experiment, and 

 the description of the effects of stimulating the various areas refers to the brain of 

 the monkey. 



i, advance of the opposite hind limb, as in walking; 2, 3, 4, complex movements 

 of the opposite leg and arm, and of the trunk, as in swimming; a, b, c, d, individual 

 and combined movements of the fingers and wrist of the opposite hand. Prehensile 

 movements. 5 , extension forward of the opposite arm and hand; supination and 

 flexion of the opposite forearm; 7, retraction and elevation of the opposite angle of 

 the mouth by means of the zygomatic muscle; 8, elevation of the alae nasi and upper 

 lip, with depression of the lower lip on the opposite side; 9, 10, opening of the mouth, 

 with (9) protrusion and (10) retraction of the tongue; region of aphasia, bilateral 

 action; n, retraction of the opposite angle of the mouth, the head turned slightly to 

 one side; 12, the eyes open widely, the pupils dilate, and the head and eyes turn 

 toward the opposite side; 13, 13', the eyes move toward the opposite side, with an 

 upward (13) or downward (13') deviation; the pupils are generally contracted ; 14, 

 pricking of the opposite ear, the head and eyes turn to the opposite side, and the 

 pupils dilate widely. 



