OF THE NERVUS OCTAVUS 29 



body and one of the phenomena, characterising the typical position 

 of the animal after the operation, is that this leg, having been 

 shoven involuntarily fore ward and outward , gets under the head 

 and supports this latter (see fig. 14). 



In this way the typical position of the rabbit after one-sided 

 removal of the labyrinth , reproduced as it is by the photo's fig. 

 14 A B, fig. 15 A, occurs. The neck and head are turned to 

 the side of the operation, the opposite foreleg is extended and 

 abduced , the equilateral , relaxed , has given way for the burden 

 of the body and is shoven forward. 



This position is permanent for a long time. 



A summary of the phenomena, observed directly after the remo- 

 val of the labyrinth, runs therefore as follows: 



1. A peculiar forced attitude of the eyes. The eye on the 

 operated side is turned downward and inward. 



2. A peculiar forced attitude of head and neck. The cheek on 

 the operated side is turned in the direction of that side, and laid 

 on the ground. 



3. A peculiar abduced-extended position of. the upper extremity 

 on the opposite side. 



4. Atony of the extremities on the operated side, the opposite 

 extremities on the contrary being more or less contracted. 



5. Rollings of the body towards the operated side round its 

 longitudinal axis. 



These phenomena are gradually losing their intensity up to a 

 certain limit . but they never are entirely compensated. 



3. Permanent disturbances of motion after the one-sided removal 



of the labyrinth. 



An investigation of the further course of the tempestuous motions, 

 following directly on the removal of the labyrinth on one side, is 

 of course indicated. Not only it is an interesting question whether they 

 are reduced at all afterwards , and if so in what measure , but besides 

 it is of great importance to investigate, to which extent all these 

 phenomena may be considered to be independent from one another, 

 or if we find this is not allowable, in what manner they may be 

 connected together. 



We will therefore commence with: 



a. The rolling of the body around its longitudinal axis in the 

 direction of the operated side. 



I have demonstrated already, that neck and head, shortly after 



