Document Detail

Distortions of perceived auditory and visual space following adaptation to motion.
MedLine Citation:
PMID:  18726589     Owner:  NLM     Status:  MEDLINE    
Adaptation to visual motion can induce marked distortions of the perceived spatial location of subsequently viewed stationary objects. These positional shifts are direction specific and exhibit tuning for the speed of the adapting stimulus. In this study, we sought to establish whether comparable motion-induced distortions of space can be induced in the auditory domain. Using individually measured head related transfer functions (HRTFs) we created auditory stimuli that moved either leftward or rightward in the horizontal plane. Participants adapted to unidirectional auditory motion presented at a range of speeds and then judged the spatial location of a brief stationary test stimulus. All participants displayed direction-dependent and speed-tuned shifts in perceived auditory position relative to a 'no adaptation' baseline measure. To permit direct comparison between effects in different sensory domains, measurements of visual motion-induced distortions of perceived position were also made using stimuli equated in positional sensitivity for each participant. Both the overall magnitude of the observed positional shifts, and the nature of their tuning with respect to adaptor speed were similar in each case. A third experiment was carried out where participants adapted to visual motion prior to making auditory position judgements. Similar to the previous experiments, shifts in the direction opposite to that of the adapting motion were observed. These results add to a growing body of evidence suggesting that the neural mechanisms that encode visual and auditory motion are more similar than previously thought.
Ross W Deas; Neil W Roach; Paul V McGraw
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-08-26
Journal Detail:
Title:  Experimental brain research     Volume:  191     ISSN:  1432-1106     ISO Abbreviation:  Exp Brain Res     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-10-28     Completed Date:  2008-12-31     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  473-85     Citation Subset:  IM    
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MeSH Terms
Acoustic Stimulation
Auditory Perception / physiology*
Functional Laterality
Hearing / physiology
Motion Perception / physiology*
Neural Pathways / physiology
Sound Localization
Space Perception / physiology*
Visual Acuity
Visual Perception / physiology*
Young Adult
Grant Support
//Wellcome Trust

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