Abstract
Concerning the vestibular labyrinth, especially the function of the otolithic organ, many obscure problems have been remained. Conflicting statements appear in the medical literature concernigg the sacular function. The author carried out the experiment by giving the injury to the saccular nerve in the osseous labyrinth, without the influece on the labyrinthine fluid. On the other hand, each of other labyrinthine nerve was injured similarly and the saccular function was confirmed. Moreo- ver, the saccular macula was e5posed to D.C. stimulations. In the observation of these experiments, the author examined the relfex movement of eyeballs. The localization of the injury was confirmed by histological examination. The results obtained were summerized as follows: The saccule of rabbit has labyrinthine functions. 1) It performs the compensatory deviation of eyeballs in frontal plane, and the saccule moves the eyeball upward homolaterally and the downward contralaterally. 2) The saccule reacts on the movement of eyeball when the otolith is in suspended position. 3) The number of nystagmus changes by the stimulation on saccule, decreasing the number of mystugmus toward the opposite side.
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