Document Detail

Acoustic facilitation of object movement detection during self-motion.
MedLine Citation:
PMID:  21307050     Owner:  NLM     Status:  MEDLINE    
In humans, as well as most animal species, perception of object motion is critical to successful interaction with the surrounding environment. Yet, as the observer also moves, the retinal projections of the various motion components add to each other and extracting accurate object motion becomes computationally challenging. Recent psychophysical studies have demonstrated that observers use a flow-parsing mechanism to estimate and subtract self-motion from the optic flow field. We investigated whether concurrent acoustic cues for motion can facilitate visual flow parsing, thereby enhancing the detection of moving objects during simulated self-motion. Participants identified an object (the target) that moved either forward or backward within a visual scene containing nine identical textured objects simulating forward observer translation. We found that spatially co-localized, directionally congruent, moving auditory stimuli enhanced object motion detection. Interestingly, subjects who performed poorly on the visual-only task benefited more from the addition of moving auditory stimuli. When auditory stimuli were not co-localized to the visual target, improvements in detection rates were weak. Taken together, these results suggest that parsing object motion from self-motion-induced optic flow can operate on multisensory object representations.
F J Calabro; S Soto-Faraco; L M Vaina
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2011-02-09
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  278     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-08-11     Completed Date:  2011-12-19     Revised Date:  2014-03-19    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2840-7     Citation Subset:  IM    
Copyright Information:
This journal is © 2011 The Royal Society
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MeSH Terms
Acoustic Stimulation*
Motion Perception / physiology*
Movement / physiology*
Photic Stimulation
Retina / physiology
Visual Perception
Young Adult
Grant Support
263145//European Research Council; P30 DC04663/DC/NIDCD NIH HHS; R01 NS064100/NS/NINDS NIH HHS; R01NS064100/NS/NINDS NIH HHS

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