Vestibular nuclei activity in the alert monkey during suppression of vestibular and optokinetic nystagmus.

Experimental brain research ·Vol. 37 ·No. 3 ·1979-00-00 ·Pages 581-93

Buettner UW, Büttner U

Abstract

Single neurons were recorded in the vestibular nuclei of monkeys trained to suppress nystagmus by visual fixation during vestibular or optokinetic stimulation. During optokinetic nystagmus vestibular nuclei neurons exhibit frequency changes. With the suppression of optokinetic nystagmus this neuronal activity on average is attenuated by 40% at stimulus velocities of 40 degrees/s. At a stimulus velocity of 5 degrees/s responses are, under both conditions, close to threshold. For steps in velocity, suppression of vestibular nystagmus shortens the time constants of the decay of neuronal activity from 15--35 s to 5--9 s, while the amplitude of the response remains unchanged. The results are discussed in relation to current models of visual-vestibular interaction. These models use a feedback mechanism which normally operates during vestibular and optokinetic nystagmus. Nystagmus suppression interrupts this feedback loop.

MeSH Terms

Animals Eye Movements Fixation, Ocular Haplorhini Macaca mulatta Neural Inhibition Neurons/physiology Semicircular Canals/innervation Vestibular Nuclei/physiology

Authors & Affiliations

2 authors, click to expand affiliations / ORCID

Buettner U W

Büttner U

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26 references, click to expand

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Article Info

Journal

Experimental brain research

Abbr.

Exp Brain Res

ISSN

0014-4819

DOI

10.1007/BF00236825

Published

1979-00-00

Pages

581-93

Language

English

Region

Germany

NLM ID

0043312

Subset

External Links

PubMed source DOI: 10.1007/BF00236825 View journal details

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Vestibular nuclei activity in the alert monkey during suppression of vestibular and optokinetic nystagmus.

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