DIFFERENTIAL FEATURES OF "CEREBELLAR" AND "VESTIBULAR" PHENOMENA IN MACACUS RHESUS

Abstract

Much of the early work on cerebellar and vestibular function involved large experimental lesions, for example: complete removal of the cerebellum, hemidecerebellation or large puncture lesions of the lateral lobes or vermis. Such large lesions, even if the ever present possibility of complicating lesions was disregarded, always raised the question of the simplicity of the symptomatic elements. The same may be said of human clinical material. Because of the probability of existence of side-effects in much of the experimental work, and certainly in most of the human clinical material, and because of the generally admitted close relationship of the cerebellum and the vestibular system, it seemed worth while to investigate the differential features of lesions of the cerebellar and the vestibular system and the functional interrelationships of the two systems. This was made possible by the large number of experimental animals in our series with anatomically controlled lesions of the