Commissural effects in the otolith system.

Commissural effects in the otolith system. Research Abstract Details 

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Commissural effects in the otolith system. Abstract Text:

Y Uchino,H Sato,M Zakir,K Kushiro,M Imagawa,Y Ogawa,S Ono,H Meng,X Zhang,M Katsuta,N Isu,V J Wilson,

We examined whether otolith-activated second- and third-order vestibular nucleus neurons received commissural inhibition from the contralateral otolithic macula oriented in the same geometric plane. For this purpose we performed intracellular recording in vestibular nucleus neurons after stimulation of the ipsi- and contralateral utricular and saccular nerves. More than half (41/72) of the utricular-activated second-order vestibular nucleus neurons received commissural inhibition from the contralateral utricular nerve. The remaining neurons (31/72) showed no visible response to contralateral utricular nerve stimulation. About half (17/36) of utricular-activated third-order neurons also received commissural inhibition from the contralateral utricular nerve. Approximately 10% (7/67) of saccular-activated second-order vestibular neurons received polysynaptic commissural inhibition, whereas 16% (11/67) received commissural facilitation. The majority (49/67) of saccular second-order vestibular neurons, and almost all (22/23) third-order neurons, showed no visible response to stimulation of the contralateral saccular nerve. The present findings suggest that many utricular-activated vestibular nucleus neurons receive commissural inhibition, which may provide a mechanism for increasing the sensitivity of vestibular neurons to horizontal linear acceleration and lateral tilt of the head. Commissural inhibition in the saccular system was less prominent than in the utricular system.

Commissural effects in the otolith system. Publishing Authors By Initials

Y Uchino,H Sato,M Zakir,K Kushiro,M Imagawa,Y Ogawa,S Ono,H Meng,X Zhang,M Katsuta,N Isu,VJ Wilson,

For similar nervous system: central nervous system: brain: brain stem: rhombencephalon: metencephalon: pons: vestibular nuclei research abstracts see: nervous system: central nervous system: brain: brain stem: rhombencephalon: metencephalon: pons: vestibular nuclei research

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Commissural effects in the otolith system. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 136

Page Numbers: 421-30

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ISSN: 0014-4819

DAY: 15

MONTH: Feb

YEAR: 2001

Commissural effects in the otolith system. Information

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LANGUAGE: eng

NlmUniqueID: 43312

Commissural effects in the otolith system. Keywords Mesh Terms:

KEYWORDS: Vestibular Nuclei

MESH TERMS: physiology

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Grant and Affiliation Information for Commissural effects in the otolith system.

AFFILIATION: Department of Physiology, Tokyo Medical University, Japan. y-uchino@tokyo-med.ac.jp

Country: Germany

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MEDLINETA: Exp Brain Res

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