244 



STUDIES IN LIFE AND SENSE. 



FIG. 25. THE LEFT SIDE OF MONKEY'S BRAIN (Ferrier). 



advances the opposite hind limb, as in walking. Stimulation of the 

 region marked 2, gives complex movements of thigh, leg, and foot, 

 as in grasping with the foot, or scratching the chest or abdomen with 



its foot ; 3, movements 

 of the tail, associated 

 with the preceding 

 actions ; 4, retraction 

 with extension and 

 abduction of the op- 

 posite arm, the hand 

 being pronated ; 5, 

 extension forwards of 

 the opposite arm and 

 hand as if to touch 

 something in front ; 

 a, b, c, d, individual 

 and combined move- 

 ments of fingers and 

 wrist ending in clench- 

 ing the fist, and illus- 

 trated in prehensile 

 movements of the op- 

 posite hand ; 6, supi- 

 nation and flexion 

 of the forearm, as in 

 raising the hand to 

 the mouth ; 7, action 

 of the zygomatic mus- 

 cles, by which the 

 angle of the mouth 

 is retracted and ele- 

 vated ; 8, elevation of 

 the sides of nose and 

 upper lip, exposing 

 the eye-teeth; 9 and 

 10, opening of the 

 mouth with protrusion 

 (9) and retraction ( i o) 

 of the tongue ; n,re- 



FIG. 2 6.-MoN K EY's BRAIN VIEWED FROM ABOVE. traction of Opposite 



angle of the mouth; 



12, wide opening of eyes, dilatation of pupils, and head and eyes 

 turning to opposite side ; 13 and 13', movement of eyes towards 

 opposite side, with upward or downward deviation ; 14, pricking of 

 opposite ear, head and eyes turning to opposite side and pupils dilating 



