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Somatosensory Gating Is Dependent on the Rate of Force Recruitment in the Human Orofacial System.

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Title: Somatosensory Gating Is Dependent on the Rate of Force Recruitment in the Human Orofacial System.
Authors: Andreatta, Richard D.1 richard.andreatta@uky.edu, Barlow, Steven M.2
Source: Journal of Speech, Language & Hearing Research. Dec2009, Vol. 52 Issue 6, p1566-1578. 13p. 1 Diagram, 2 Charts, 1 Graph.
Subject Terms: Sensorimotor integration, Lips, Mechanoreceptors, Trigeminal nerve, Physiological aspects of speech, Psychophysics
Abstract: Purpose: Functional orofacial behaviors vary in their force endpoint and rate of recruitment. This study assessed the gating of orofacial cutaneous somatosensation during different cyclic lip force recruitment rates. Understanding how differences in the rate of force recruitment influences trigeminal system function is an important step toward furthering the knowledge of orofacial sensorimotor control. Method: Lower lip vibrotactile detection thresholds (LL-VDTs) were sampled in response to sinusoidal inputs delivered to the lip vermilion at 5, 10, 50, and 150 Hz while adult participants engaged in a baseline condition (no force), 2 low-level lip force recruitment tasks differing by rate (0.1 Hz or 2Hz), and passive displacement of the lip as a control to approximate the mechanosensory consequences of voluntary movement. Results: LL-VDTs increased significantly for test frequencies at or below 50 Hz during voluntary lip force recruitment. LL-VDT shifts were positively related to changes in the rate of lip force recruitment, whereas passively imposed displacements of the lip were ineffective, in shifting LL-VDTs. Conclusions: These findings are considered in relation to published reports of force-related sensory gating in orofacial and limb systems and the potential role of somatosensory gating along the trigeminal system during orofacial behaviors. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: Somatosensory Gating Is Dependent on the Rate of Force Recruitment in the Human Orofacial System.
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  Data: <searchLink fieldCode="AR" term="%22Andreatta%2C+Richard+D%2E%22">Andreatta, Richard D.</searchLink><relatesTo>1</relatesTo><i> richard.andreatta@uky.edu</i><br /><searchLink fieldCode="AR" term="%22Barlow%2C+Steven+M%2E%22">Barlow, Steven M.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Dec2009, Vol. 52 Issue 6, p1566-1578. 13p. 1 Diagram, 2 Charts, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Sensorimotor+integration%22">Sensorimotor integration</searchLink><br /><searchLink fieldCode="DE" term="%22Lips%22">Lips</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanoreceptors%22">Mechanoreceptors</searchLink><br /><searchLink fieldCode="DE" term="%22Trigeminal+nerve%22">Trigeminal nerve</searchLink><br /><searchLink fieldCode="DE" term="%22Physiological+aspects+of+speech%22">Physiological aspects of speech</searchLink><br /><searchLink fieldCode="DE" term="%22Psychophysics%22">Psychophysics</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Purpose: Functional orofacial behaviors vary in their force endpoint and rate of recruitment. This study assessed the gating of orofacial cutaneous somatosensation during different cyclic lip force recruitment rates. Understanding how differences in the rate of force recruitment influences trigeminal system function is an important step toward furthering the knowledge of orofacial sensorimotor control. Method: Lower lip vibrotactile detection thresholds (LL-VDTs) were sampled in response to sinusoidal inputs delivered to the lip vermilion at 5, 10, 50, and 150 Hz while adult participants engaged in a baseline condition (no force), 2 low-level lip force recruitment tasks differing by rate (0.1 Hz or 2Hz), and passive displacement of the lip as a control to approximate the mechanosensory consequences of voluntary movement. Results: LL-VDTs increased significantly for test frequencies at or below 50 Hz during voluntary lip force recruitment. LL-VDT shifts were positively related to changes in the rate of lip force recruitment, whereas passively imposed displacements of the lip were ineffective, in shifting LL-VDTs. Conclusions: These findings are considered in relation to published reports of force-related sensory gating in orofacial and limb systems and the potential role of somatosensory gating along the trigeminal system during orofacial behaviors. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1044/1092-4388(2009/08-0116)
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              Text: Dec2009
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