| Threshold for detection of incisal forces is increased by jaw movement. | |
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MedLine Citation:
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PMID: 20200410 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Current knowledge regarding the sensitivity of the teeth to forces is based on psychophysical experiments that measured touch detection thresholds under static jaw conditions. It is not known whether jaw movements alter the perception of forces applied to the teeth, but, based on limb movement studies, it is hypothesized that the perception of mechanoreceptor outputs will be downwardly modulated by jaw movements. We predicted that, compared with static jaw conditions, rhythmic jaw movements would be associated with significantly higher psychophysical thresholds for the detection of incisally applied forces. In eight participants, mechanical pulses were delivered to an incisor during static jaw holding or during cyclic jaw opening and closing. Analogous to findings in human limbs, the psychophysical salience of periodontal mechanoreceptor feedback was downwardly modulated by physiologically relevant movements; detection thresholds for mechanical pulses applied to a central incisor were significantly higher during jaw-closing movements than during static jaw positioning. |
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Authors:
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P F Sowman; R S A Brinkworth; K S T?rker |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-03-03 |
Journal Detail:
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Title: Journal of dental research Volume: 89 ISSN: 1544-0591 ISO Abbreviation: J. Dent. Res. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-16 Completed Date: 2010-04-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0354343 Medline TA: J Dent Res Country: United States |
Other Details:
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Languages: eng Pagination: 395-9 Citation Subset: D; IM |
Affiliation:
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Macquarie Centre for Cognitive Science (MACCS), Institute of Human Cognition and Brain Science, Macquarie University, Sydney, NSW 2109, Australia. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Bite Force* Dental Stress Analysis Female Humans Male Mandible / physiology* Mastication Mechanoreceptors / physiology Movement Periodontal Ligament / cytology Sensory Thresholds / physiology Touch Perception / physiology* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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