124 



Scientific Proceedings (75). 



expiratory muscle are registered simultaneously, stimulation of 

 the central end of the vagus brings out an instructive picture. 

 Throughout the period of stimulation the thorax remains quiescent 

 in an inspiratory position, while the expiratory muscle remains 

 completely relaxed. 



This phenomenon is another instance of the general law of 

 "contrary innervation" (Meltzer), or "reciprocal innervation" 

 (Sherrington). Inhibition of the expiratory group of muscles 

 during inspiration was suggested by one of us over thirty years 

 ago. 1 



68 (1132) 



A demonstration of the effects of some lesions of the nervous 



system. 



By J. Gordon Wilson and F. H. Pike. 



[From the Department of Otology, Northwestern University, and the 

 Department of Physiology, Columbia University.] 



The effects of the lesions were shown in cinematograph films 

 of three different animals. A rabbit which was brought into the 

 laboratory some months ago presented constant marked torsion of 

 the head to the left. There was no nystagmus, but merely a 

 constant deviation of the eyes. The animal could move about on 

 rough surfaces if it went slowly and carefully, or if its left side was 

 supported by the side of the cage. If put on a smooth surface 

 with the left side unsupported, any attempt on the part of the 

 animal to move was followed by rolling movements to the left, 

 about the long axis of the body. If no obstacle was placed in its 

 way, the animal might roll for several yards before regaining its 

 upright position. The animal was said to be about eight months 

 old at the time it was brought into the laboratory, and to have 

 been in the same condition from birth. The only gross changes 

 visible at autopsy were in the left otic labyrinth. The nature of 

 these changes was not determined by inspection. The histological 

 report will be presented later. One interesting point in the de- 

 portment of the rabbit was its lack of compensation for the loss 



1 Arch, fur Physiol. (DuBois-Reymond's) 1883, 216. 



