ON THE MAMMALIAN NERVOUS SYSTEM. 



443 



INFLUENCE of Section of the Lateral Column on the opposite Side to the Excited 



Nerve on the Cord Effect. 



It will be noticed that in only one case (346) was there any marked reduction, and 

 that this did not occur when the intensity of the stimulus was increased. Instead of 

 reducing the effect the section in two cases increased it. The average reduction of 

 10 per cent, is probably too high, owing to some unknown factor being present to 

 cause the exceptional low reading. This presumption is rendered more probable by 

 the next set of results, the converse experiments. 



SECTION of all Columns except Lateral on Opposite Side to Excited Nerve. 



These results show that at any rate under the conditions which were present in 

 these experiments, those, namely, of moderate narcosis, the lateral column of the cord 

 opposite to the nerve excited can transmit only 6 per cent, of the nerve impulses which 

 produce the electrical change in the cord when all the other structures are divided.- 

 To what extent it can act as a bridge when the ether is removed, as in MIESCHEH 



3 L 2 



