Document Detail


Otolithic thresholds influence the perception of passive linear displacement.
MedLine Citation:
PMID:  8749076     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The vestibular sensors are the necessary source of information for estimating self-displacement during passive linear transport. Displacement has to be computed from the otolith signal by means of an integration process (path integration), which provides a measure of linear acceleration. However, the onset of self-motion perception is delayed due to perceptual thresholds. We investigated the effect of these thresholds on the estimation of passive displacement. Subjects seated on a linear acceleration device (ESA-SLED) were displaced to their left or right. Two tasks were performed: (1) subjects pressed a button when they perceived self-motion; (2) subjects pressed a button when they thought they had reached a previously seen visual target located above the sled rail. Displacement estimation (task 2) was found to depend upon the acceleration magnitude and on the individual motion perception threshold measured in task 1. The results can be explained by assuming that self-displacement computation starts at the onset of self-motion perception and is initialised by a value that is independent of the amplitude of acceleration, thereby compensating for the displacement information lost due to the thresholds.
Authors:
S Glasauer; I Israël
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta oto-laryngologica. Supplementum     Volume:  520 Pt 1     ISSN:  0365-5237     ISO Abbreviation:  Acta Otolaryngol Suppl     Publication Date:  1995  
Date Detail:
Created Date:  1996-09-20     Completed Date:  1996-09-20     Revised Date:  2008-02-13    
Medline Journal Info:
Nlm Unique ID:  0370355     Medline TA:  Acta Otolaryngol Suppl     Country:  NORWAY    
Other Details:
Languages:  eng     Pagination:  41-4     Citation Subset:  IM; S    
Affiliation:
Laboratoire de Physiologie de la Perception et de l'Action, College de France-CNRS, Paris, France.
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MeSH Terms
Descriptor/Qualifier:
Acceleration
Humans
Kinesthesis / physiology*
Orientation / physiology*
Otolithic Membrane / physiology*
Sensory Thresholds / physiology
Vestibule, Labyrinth / physiology
Visual Perception / physiology

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


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