In a previous article1 the effect of unilateral labyrinthectomy was discussed. The results that we had obtained led us to perform further experiments, especially in regard to the change in the response of the remaining labyrinth over a period of several days. Previous experiments2 were extended to include the effect of the loss of proprioceptive sensations from one half of the body on the readjustment of equilibrium in labyrinthectomized dogs. And since the cerebellum is regarded as the chief center concerned in unconscious proprioception3 and is also a highly developed vestibular nucleus, we destroyed part of it and noted the effect of this procedure on the readjustment.
The history of prior discoveries in the physiology and anatomy of the labyrinth is so well known as to require no repetition here. However, one recent anatomic finding will be mentioned. This is the discovery by Steinhausen4 that the cupola entirely closes the