Movement-related skin strain associated with goal-oriented lip actions |
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Authors: | N P Connor James H Abbs |
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Institution: | (1) Division of Otolaryngology – Head and Neck Surgery, University of Wisconsin Clinical Science Center H4/3 Surgery G-Wing, 600 Highland Avenue, Madison, WI 53792, USA, e-mail: connor@surgery.wisc.edu, Tel.: 1-608-265-8711, Fax: 1-608-263-0454, US;(2) Department of Neurology, University of Wisconsin Medical School, Madison, WI, USA, US |
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Abstract: | It is generally accepted that sensory input contributes to the generation of natural movements. In most motor systems, muscle
spindles, tendon organs, joint receptors, and cutaneous mechanoreceptors may provide proprioceptive information. However,
the perioral area of the human face lacks muscle spindles, tendon organs, and joint receptors and is therefore a model system
for the study of cutaneous afferent contributions to proprioception. This investigation examined a series of skin strains
associated with lower-lip movements in human subjects to determine if such strains, which serve as stimuli for cutaneous mechanoreceptors,
may underlie proprioception in the face. The results suggested that strains associated with lower-lip movements were of sufficient
magnitude to elicit cutaneous mechanoreceptor discharge, as shown in recent human microneurographic studies. Further, the
magnitude of multiple strains was predictive of lower-lip movement endpoints. These results highlight the potential importance
of cutaneous mechanoreceptors as putative proprioceptors.
Received: 16 February 1998 / Accepted: 26 May 1998 |
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Keywords: | Cutaneous mechanoreceptor Movement Proprioception Facial Speech |
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