Document Detail


Three-dimensional properties of human pursuit eye movements.
MedLine Citation:
PMID:  1455697     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
For any given location and velocity of a point target, there are infinitely many different eye velocities that the pursuit system could use to track the target perfectly. Three-dimensional recordings of eye position and velocity in 8 normal human subjects showed that the system chooses the unique tracking velocity that keeps eye position vectors (a particular mathematical representation of three-dimensional eye orientation) confined to a single plane, i.e. pursuit obeys Listing's law. One advantage of this strategy over other possible ones, such as choosing the smallest eye velocity compatible with perfect tracking, is that it permits continuous pursuit without accumulation of ocular torsion. For nonpoint targets, there is at most one eye velocity compatible with perfect retinal image stabilisation, and the optimal velocity may not fit Listing's law; we observed small but consistent deviations from the law during pursuit of rotating line targets.
Authors:
D Tweed; M Fetter; S Andreadaki; E Koenig; J Dichgans
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  32     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1993-01-07     Completed Date:  1993-01-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1225-38     Citation Subset:  IM; S    
Affiliation:
Department of Neurology, University of Tübingen, Fed. Rep. Germany.
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MeSH Terms
Descriptor/Qualifier:
Adult
Eye Movements / physiology*
Female
Humans
Male
Mathematics
Models, Biological
Rotation

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