Document Detail

Smooth pursuit eye movements and perception share target selection, but only some central resources.
MedLine Citation:
PMID:  19428618     Owner:  NLM     Status:  MEDLINE    
Smooth pursuit eye movements have been linked to perception by a common attentional mechanism. We investigated whether perceptual performance was traded for smooth pursuit performance. While tracking a red target cross, observers had to discriminate the orientation of a flashed peripheral grating. We manipulated the priority given to the two tasks. Pursuit gain changed according to observers' effort to pursue the target, but perceptual discrimination of the peripheral flash was not affected by these changes, suggesting that smooth pursuit does not use the same resources as perception. Complete resource sharing may be confined to situations involving multiple moving objects. Next, we added a second perceptual task on the foveal pursuit target. Foveal discrimination performance was traded for peripheral discrimination performance and pursuit gain followed the perceptual priorities. Thus, smooth pursuit gain is affected by which target has been selected for enhanced perceptual processing, but that does not imply shared perceptual resources.
Dirk Kerzel; Sabine Born; David Souto
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-02-02
Journal Detail:
Title:  Behavioural brain research     Volume:  201     ISSN:  1872-7549     ISO Abbreviation:  Behav. Brain Res.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-05-11     Completed Date:  2009-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8004872     Medline TA:  Behav Brain Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  66-73     Citation Subset:  IM    
Faculté de Psychologie et des Sciences de l'Education, Université de Genève, Geneve, Switzerland.
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MeSH Terms
Analysis of Variance
Discrimination (Psychology)
Eye Movement Measurements
Neuropsychological Tests
Pursuit, Smooth*
Task Performance and Analysis
Visual Perception*

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