Herrick, Localization ifi the Cat. 191 



Bechterew's mistake, ^according to Munk, is in not remov- 

 ing the entire region, enough of the cortex remaining to explain 

 the evidence of sensation. brought forward by the former. 



Munk distinguishes between tactile reflex and general re- 

 flex. The former is completely lost, the latter reduced, but sub- 

 sequently regained. He seeks to explain a part of the phenom- 

 ena supposed by Goltz to be due to the repressive effect of irri- 

 tative processes as the result of isolation. 



Our subject was a half-grown kitten, and portions were re- 

 moved from the left hemisphere in three successive operations, 

 so that a long, narrow area extending from the crucial]sulcus to the 

 limits of the middle external gyrus caudad, and including nearly 

 the whole of that gyrus, was extirpated. The entire thickness of 

 the cortex and most of the white matter was removed. The first 

 operation was apparently near the front of Munk's visual sphere 

 and the kitten showed ^some disturbance of vision in the op- 

 posite eye, but, though the incision was subsequently carried 

 further caudad, these symptoms did not reappear. After the 

 last operation, which invaded the fore-leg area of Munk, there 

 was decided disturbance of the motor and sensory functions for 

 both limbs. The skin sensation and reaction against pain was 

 reduced immediately after the operation, but these disturbances 

 soon disappeared. The voluntary motion was but little dis- 

 turbed but the fore foot tended constantly to double under and 

 trip up and slipped helplessly away from the line of support. 

 The hind leg was similarly affected, sliding laterad and failing to 

 support the body. In walking and runnuig no imperfection was 

 noticeable, except when obstacles or changes in the direction of 

 motion called out what has been described. Most noticeable of 

 all was the change in tiie position of the limb when permitted to 

 hang free. If the body were supported upon the ventral aspect 

 the left legs were drawn up and quickly responded to any tend- 

 ency to fall in that direction, while the right legs hung pendant 

 and failed to react against a push threatening a fall to the right. 

 The kitten was watched four or five weeks, during which time 

 nearly all symptoms disappeared except those last mentioned, 

 which remained to a certain extent to the last. Another curious 

 effect of the operation was a strong tendency, for some time 

 after the extirpation, to shake the feet of the right side (rarely 



