Document Detail


Variable otolith contribution to the galvanically induced vestibulo-ocular reflex.
MedLine Citation:
PMID:  10321499     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The torsional eye movements elicited by sinusoidal galvanic vestibular stimulation (GVS) (0.012-3.13 Hz) were examined in healthy humans. GVS consistently induced sinusoidal modulation of the torsional slow phase velocity (SPV), which was linearly related to stimulus intensity. At low frequencies (< 0.1 Hz) nystagmic responses could be discriminated from an underlying 'tonic' modulation of eye position, which was prominent in some, but negligible in other subjects, and was not correlated with the SPV modulation. The actual SPV modulation consistently exceeded the (hypothetical) velocity modulation derived from the tonic positional components, albeit variably by almost 20-fold across subjects. This indicates that the contribution of possibly otolith-related response components to the galvanic vestibulo-ocular reflex may vary considerably in normal individuals.
Authors:
J F Kleine; W O Guldin; A H Clarke
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Neuroreport     Volume:  10     ISSN:  0959-4965     ISO Abbreviation:  Neuroreport     Publication Date:  1999 Apr 
Date Detail:
Created Date:  1999-06-23     Completed Date:  1999-06-23     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9100935     Medline TA:  Neuroreport     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1143-8     Citation Subset:  IM; S    
Affiliation:
Neurologische Klinik, Klinikum Grosshadern, München, Germany.
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MeSH Terms
Descriptor/Qualifier:
Adult
Electric Stimulation
Eye Movements / physiology
Female
Humans
Male
Otolithic Membrane / physiology*
Reference Values
Reflex, Vestibulo-Ocular / physiology*
Torsion Abnormality
Vestibule, Labyrinth / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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