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Self-motion reproduction can be affected by associated auditory cues.
MedLine Citation:
PMID:  21864463     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Successful locomotion through space requires precise estimation of the direction and distance travelled. Previous studies have shown that humans can use velocity information arising from visual, vestibular and somatosensory signals to reproduce passive linear displacements. In the present study we investigated whether also associated auditory velocity cues are used for distance estimation. Subjects had to reproduce (active condition) the distance of a previously seen sequence of simulated linear motion (passive condition) across a ground plane. During both, the passive and active displacement, they heard a tone with a frequency being proportional to the simulated speed (test trials). In some trials the relationship between optical velocity and tone frequency was differently scaled during the active displacements, i.e., the frequency of the tone was either higher or lower than in the passive displacement (catch trials). In test trials, subjects reproduced distances quite accurately. In catch trials, however, subjects' performance was disturbed: when the frequency was lower subjects used higher speeds, resulting in a substantial overshoot of travelled distance, whereas a higher frequency resulted in an undershoot of travelled distance. Our results clearly show that during self-motion tone frequency can be used as a velocity cue and helps to update positional information over time.
Authors:
Anna von Hopffgarten; Frank Bremmer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Seeing and perceiving     Volume:  24     ISSN:  1878-4755     ISO Abbreviation:  Seeing Perceiving     Publication Date:  2011  
Date Detail:
Created Date:  2011-08-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101531524     Medline TA:  Seeing Perceiving     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  203-22     Citation Subset:  IM    
Affiliation:
Department of Neurophysics, Philipps-University Marburg, Karl-von-Frisch-Str. 8a, 35043 Marburg, Germany.
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