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Modulation of neck muscle activity induced by intra-oral stimulation in humans

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Title: Modulation of neck muscle activity induced by intra-oral stimulation in humans
Authors: Torisu, Tetsurou / Tanaka, Mihoko / Murata, Hiroshi / Wang, Kelun / Arendt-Nielsen, Lars / De Laat, Antoon / Svensson, Peter
Issue Date: May-2014
Publisher: Elsevier Ireland Ltd
Citation: Clinical Neurophysiology, 125(5), pp.1006-1011; 2014
Abstract: Objective: To investigate the effect of painful electrical stimuli applied to intra-oral tissues around the teeth on the neck muscle activity in healthy humans. Methods: Electromyographic (EMG) responses of the dorsal neck muscles evoked by intra-oral electrical stimulation were recorded before and after local anesthesia to the stimulus site in 17 healthy volunteers. Results: Inhibition of dorsal neck muscle EMG activities on average 80% compared to baseline level was observed with a latency around 50. ms after the electrical stimulation before anesthesia, and the EMG activity inhibition decreased after anesthesia of the intra-oral stimulus site. The perceived intensity of the electrical stimuli as scored on a visual analogue scale (VAS) was 6.1. ±. 0.4. cm before anesthesia and 1.5. ±. 0.2. cm after anesthesia. Conclusion: Intra-oral stimulation can inhibit neck muscle activity. This modulation might be attributed mainly to nociceptive afferent nerves however, non-nociceptive fibers could also be responsible. Significance: Intra-oral information including nociceptive activity can inhibit neck muscle activity. From a clinical viewpoint, the present findings demonstrate the neural connectivity between the trigeminal region and the cervical region raising the possibility that orofacial pain conditions could influence head, neck and shoulder activity.
Keywords: Electromyography (EMG) / Intra-oral stimulation / Pain / Temporomandibular disorders / Trigemino-cervical reflex
URI: http://hdl.handle.net/10069/34403
ISSN: 13882457
DOI: 10.1016/j.clinph.2013.10.018
Rights: © 2013 International Federation of Clinical Neurophysiology. / NOTICE: this is the author’s version of a work that was accepted for publication in Clinical Neurophysiology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Clinical Neurophysiology, 125, 5, (2014)
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/34403

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