| Auditory and visual orienting responses in listeners with and without hearing-impairment. | |
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MedLine Citation:
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PMID: 20550266 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Head movements are intimately involved in sound localization and may provide information that could aid an impaired auditory system. Using an infrared camera system, head position and orientation was measured for 17 normal-hearing and 14 hearing-impaired listeners seated at the center of a ring of loudspeakers. Listeners were asked to orient their heads as quickly as was comfortable toward a sequence of visual targets, or were blindfolded and asked to orient toward a sequence of loudspeakers playing a short sentence. To attempt to elicit natural orienting responses, listeners were not asked to reorient their heads to the 0 degrees loudspeaker between trials. The results demonstrate that hearing-impairment is associated with several changes in orienting responses. Hearing-impaired listeners showed a larger difference in auditory versus visual fixation position and a substantial increase in initial and fixation latency for auditory targets. Peak velocity reached roughly 140 degrees/s in both groups, corresponding to a rate of change of approximately 1 micros of interaural time difference per millisecond of time. Most notably, hearing-impairment was associated with a large change in the complexity of the movement, changing from smooth sigmoidal trajectories to ones characterized by abruptly changing velocities, directional reversals, and frequent fixation angle corrections. |
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Authors:
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W Owen Brimijoin; David McShefferty; Michael A Akeroyd |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-16 Completed Date: 2010-10-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 3678-88 Citation Subset: IM |
Affiliation:
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MRC Institute of Hearing, Research Scottish Section, Glasgow Royal Infirmary, Glasgow G31 2ER, United Kingdom. owen@ihr.gla.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adolescent Adult Age Factors Aged Auditory Perception* Biomechanics Case-Control Studies Ear Head Movements* / physiology Hearing Disorders* / physiopathology Humans Middle Aged Psychophysics Reaction Time Sound Localization* Time Factors Visual Perception* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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//Chief Scientist Office; //Medical Research Council |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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