ORGANIC MOVEMENTS 87 



tions in question in the normal manner during his previous 

 life. There always had been many normal stimulations 

 before the operation, and who is able to say whether the 

 different localities of the brain may not have become 

 specific ly hawing been stimulated specifically'? We shall 

 conic back to this question on another occasion. 



Now, on the other hand, the experiments made with the 

 aid of an extirpation of parts of the brain, as carried out 

 by Goltz and many others, have positively shown, as will 

 also be discussed later on, that there may be a certain 

 regulation in those parts, at least to a certain extent. 

 Of course, there probably will be a difference in regulation 

 according to whether the single parts of one and the same 

 sensory sphere, or whether parts belonging to different 

 " senses," are in question. There may be a regulability in 

 the first case and not in the latter. But even then the 

 principle of " specific energy " would be broken as far as 

 the single elements of one nerve or the single parts of one 

 so-called " centre " are concerned : one and the same element 

 of the brain would be related to various qualities of sensa- 

 tion at least with regard to one and the same sensory 

 sphere and, on the other hand, we could hardly escape 

 the hypothetic assumption that one and the same fibre of 

 a nerve is able to transmit stimulations that are different 

 with regard to sensory " quality." This view is held at 

 present by Hering, 1 while Wundt 2 seems to go still farther 

 in assuming what might be called the original equi- 

 potentiality of the brain. 



Thus the principle of Mueller might be half true, half 



1 Zur Theorie der Nerventdtigkeit, Leipzig, 1899. 

 2 Physiologische Psychologic, 5. Aufl., Leipzig, 1903. 



