r_'S mi-: M;KY<HS s VST KM AND ITS < O\SI;K\ ATIUX 



exchange would he attended hy :iny remarkable gain or 

 In tn either. The slight and liniiled <pinal reflexes would 

 not he likely to he at all strange or unfamiliar to the new 

 po-ses<ors of the transferred equipment. If each could 

 now take for his own the medulla of his fellow, he might 

 notice a certain strangeness in his reactions. Yasoinotor 

 idiosyncrasies might he realized. The heart might alter 

 its average rate. Experience might reveal changes in the 

 capacity of the digestive system under new central 

 government. Now. if the cerebellum were also to be 

 carried over from A to B and the corresponding part 

 removed from B and given to A, the results would prob- 

 ably be much more positive. Peculiarities of gait, accom- 

 plishments or shortcomings in the line of equilibration, 

 skill in dancing or swimming any of these might go with 

 one cerebellum to the new owner. 



The paragraph above suggests what is undoubtedly 

 true of man. that some acquisitions are registered in the 

 cerebellum if not lower down in the nervous system. But 

 when all allowance has been made for this we feel sure 

 that the man who had surrendered his spinal cord, his 

 medulla, and his cerebellum to another, receiving alien 

 structures in their stead, would still be essentially him- 

 self. One almost shrinks from contemplating the imagin- 

 ary exchange of one cerebrum for another. To do this 

 must be in a most literal sense to "give one's self away." 

 So far as we can see, the stock of memories and associa- 

 tion-: which A regarded as exclusively his would begin to 

 determine the behavior of the organi-m -till wearing the 

 outward appearance of B. 



This fabulous presentation merely enforces the conten- 

 tion of l.oeb that the cerebrum is the chief organ of asso- 

 ciative memory. 1 Animals in which it is not much de- 

 veloped have little capacity to learn anything by expe- 

 rience. In proportion as it becomes dominant in the 

 nervous system, memory becomes the basis of action 



1 "( 'omp:ir:itive I'livniolony of the Brain" tin Science Serii- . 



New York, I'jon. 



