38fi 



MESSRS. F. GOTCH AND V. HORSLEY 



EXCITATION of Cut Lumbar Cord (Central Surface). Electrical Effect in Dorsal Cord. 



It will be noticed that the general relationship holds in the case of impulses passing 

 up the cord, namely, that in the Monkey the most marked effects are evoked by 

 excitation of the lateral, in the Cat by excitation of the posterior columns. There 

 are, however, differences in the precise characters of the relationship as compared with 

 that indicated in the preceding group of observations when the nerve impulses were 

 descending. These differences are exhibited by separating all the lateral and 

 posterior column effects, in accordance as they were obtained with the minimal and 

 maximal stimulation, respectively. 



