ii8 BRAINS OF RATS AND MEN 



Dresel (1924) succeeded in removing the whole 

 of the cortex and corpora striata from a dog which 

 lived for three months thereafter. The animal can 

 stand and walk, but it does not do so spontaneously, 

 only under stimulation, external or internal. General- 

 ly it Hes quiet, but becomes restless if the bladder is 

 full, if hungry, or if stimulated. Then it arises and 

 runs around with depressed head. It runs into every 

 obstacle, avoiding nothing, and gradually comes to 

 rest standing, or it falls down and remains lying until 

 a new stimulus excites it. It lacks all spontaneity. 

 In general, the animal until death learned absolutely 

 nothing. On the other hand, one has the impression 

 that the dog becomes more demented, while Roth- 

 mann's dog from day to day showed advance in his 

 behavior so that finally he was competent to perform 

 complex reflexes and (apparently) the lower psychic 

 adjustments. Rothmann's dog would seek his food. 

 But this dog as long as he lived had to be fed by hand. 

 Solid food had to be thrust well down into the 

 pharynx. He never reacted to food put in contact 

 with his muzzle differently from other objects. He 

 differed from Rothmann's dog also in lacking normal 

 adjustment of the body and its members in space, 

 capacity for executing isolated movements, feeling 

 of time, the normal paroxysms of rage, and the normal 

 alternation of sleep and wakefulness. Upon applica- 

 tion of a painful stimulus Rothmann's dog would 

 snap at the place irritated. This dog never did so, 



