| A lateralized auditory evoked potential elicited when auditory objects are defined by spatial motion. | |
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MedLine Citation:
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PMID: 21056097 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Scene analysis involves the process of segmenting a field of overlapping objects from each other and from the background. It is a fundamental stage of perception in both vision and hearing. The auditory system encodes complex cues that allow listeners to find boundaries between sequential objects, even when no gap of silence exists between them. In this sense, object perception in hearing is similar to perceiving visual objects defined by isoluminant color, motion or binocular disparity. Motion is one such cue: when a moving sound abruptly disappears from one location and instantly reappears somewhere else, the listener perceives two sequential auditory objects. Smooth reversals of motion direction do not produce this segmentation. We investigated the brain electrical responses evoked by this spatial segmentation cue and compared them to the familiar auditory evoked potential elicited by sound onsets. Segmentation events evoke a pattern of negative and positive deflections that are unlike those evoked by onsets. We identified a negative component in the waveform - the Lateralized Object-Related Negativity - generated by the hemisphere contralateral to the side on which the new sound appears. The relationship between this component and similar components found in related paradigms is considered. |
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Authors:
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Andrew Butcher; Stanley W Govenlock; Matthew S Tata |
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Publication Detail:
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Type: Journal Article Date: 2010-11-04 |
Journal Detail:
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Title: Hearing research Volume: 272 ISSN: 1878-5891 ISO Abbreviation: Hear. Res. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-02-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7900445 Medline TA: Hear Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 58-68 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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The University of Lethbridge, 4401 University Drive, Lethbridge, AB, Canada T1K 3M4. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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