70 Journal of Comparative Neurology. 



I may at once remark that this " dog without cerebrum, 

 Goltz " actually proves, on anatomical investigation, to possess 

 scarcely a trace of the cerebrum. This dog was able during its 

 lifetime to employ its limbs in walking, running and standing, he 

 perceived tactile irritation of all parts of the body and could be 

 awakened from a deep sleep by these excitements or loud noises. 

 He possessed a distinct sensation of the position of his members 

 and could unquestionably be incited to adaptive activity by such 

 sensory stimuli. Nor was he totally blind, though it could not 

 be proven that he was so affected by visual sensations as to mod- 

 ify the position or movements of the body. It was evident that 

 hunger and gustatory sensations remained. The animal was pro- 

 foundly imbicile and it was impossible to enter into any sort of 

 personal relation to him. No expressions of joy or fear escaped 

 him. In restless and unvarying round he ran in his cage. With 

 the exception of the gradual reacquirement of the power to feed 

 himself, he never learned anything. However often an act may 

 have been repeated, as, for example, his daily removal from his 

 cage for feeding during eighteen months, it produced no evidence 

 of acquired experience ; each time, no matter how hungry, he 

 snapped and bit angrily. Every trace of methodical activity 

 was lost. The dog was capable of a variety of vocal express- 

 ions. His spontaneous acts, which were numerous enough, ex- 

 hibited no trace of reflection or the slightest evidence of exper- 

 ience. 



The most remarkable deficiency resulting from the removal 

 of the cerebrum was the suppression of all expressions which be- 

 tray understanding, memory, reflection, and intelligence in the 

 animal. On the other hand those faculties remained intact 

 which may be exercised without these functions, such as a cer- 

 tain degree of motor power, sensation and general irritability. 



And now, gentlemen, a glance at the charts ^ and prepara- 

 tions will show that, caudad of the great injury which has re- 

 moved the entire cerebrum and somewhat injured the thalamus. 



' The illustrations will appear at the proper time with the extended publica- 

 tion of the results of the study of the operated dog brains. 



