| Bone conduction thresholds and skull vibration measured on the teeth during stimulation at different sites on the human head. | |
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MedLine Citation:
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PMID: 20453499 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Vibratory auditory stimulation or bone conduction (BC) reaches the inner ear through both osseous and non-osseous structures of the head, but the contribution of the different pathways of BC is still unclear. In this study, BC thresholds in response to stimulation at several different locations including the eye were assessed, while the magnitudes of skull bone vibrations were measured on the front teeth in human subjects with either normal hearing on both sides or unilateral deafness with normal hearing on the other side. The BC thresholds with stimulation at the ipsilateral mastoid and ipsilateral temporal region were lower than the BC thresholds with stimulation at the other sites, as reported by previous works. The lower thresholds with stimulation at the ipsilateral mastoid and ipsilateral temporal region matched higher amplitudes of skull bone vibrations measured on the teeth, but only at frequencies below 1 kHz. With stimulation at the eye, the thresholds were significantly higher than those with stimulation at the bony sites in the frequency range of 0.25-4 kHz. While skull bone vibrations as measured on the teeth during stimulation at the eye were low for low frequencies, significant bone vibrations were measured at 3 and 4 kHz, indicating different pathways for BC for either the soft tissue or bony site stimulation. This finding contradicts a straightforward relationship between vibrations of the skull bones and BC hearing thresholds. |
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Authors:
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T Ito; C Röösli; C J Kim; J H Sim; A M Huber; R Probst |
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Publication Detail:
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Type: Journal Article Date: 2010-05-07 |
Journal Detail:
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Title: Audiology & neuro-otology Volume: 16 ISSN: 1421-9700 ISO Abbreviation: Audiol. Neurootol. Publication Date: 2011 |
Date Detail:
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Created Date: 2010-12-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9606930 Medline TA: Audiol Neurootol Country: Switzerland |
Other Details:
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Languages: eng Pagination: 12-22 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 S. Karger AG, Basel. |
Affiliation:
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Department of Otolaryngology, Head and Neck Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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