Document Detail

Visual pursuit over textured backgrounds in different depth planes.
MedLine Citation:
PMID:  1426119     Owner:  NLM     Status:  MEDLINE    
Several investigators have reported that voluntary pursuit of a moving object is less smooth when it moves over a textured background compared with when it moves over a dark background. Furthermore, when a person fixates a stationary target on a moving background, microdrifts of the eyes occur in the direction of motion of the background. These two facts suggest that OKN is not completely switched off during voluntary pursuit or fixation. Howard and Simpson (1989) found that optokinetic nystagmus (OKN) is only weakly evoked by moving stimuli which are out of the plane of convergence. This led to the prediction that voluntary pursuit of a visual target should be disrupted more by a stationary background in the same depth plane than by a background which is nearer or further away than the pursuit target. Pursuit disruption was measured by the frequency and total amplitude of saccadic intrusions. For horizontal pursuit, disruption was reduced, compared with the coplanar condition, when the textured background was further away than the target but not when it was nearer. For vertical pursuit, disruption was reduced in both the far and near conditions compared with the coplanar condition. In both cases disruption was least when the background was dark.
I P Howard; C Marton
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Experimental brain research     Volume:  90     ISSN:  0014-4819     ISO Abbreviation:  Exp Brain Res     Publication Date:  1992  
Date Detail:
Created Date:  1992-12-02     Completed Date:  1992-12-02     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  625-9     Citation Subset:  IM    
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MeSH Terms
Motion Perception*
Saccades / physiology*
Vision, Binocular

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

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