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Jaw-opening accuracy is not affected by masseter muscle vibration in healthy men
Umeå University, Faculty of Medicine, Department of Odontology.
Umeå University, Faculty of Medicine, Department of Odontology.
Umeå University, Faculty of Medicine, Department of Odontology. Wänman.
Umeå University, Faculty of Medicine, Department of Radiation Sciences.
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2014 (English)In: Experimental Brain Research, ISSN 0014-4819, E-ISSN 1432-1106, Vol. 232, no 11, 3501-3508 p.Article in journal (Refereed) Published
Abstract [en]

There is a functional integration between the jaw and neck regions with head extension-flexion movements during jaw-opening/closing tasks. We recently reported that trigeminal nociceptive input by injection of hypertonic saline into the masseter muscle altered this integrated jaw-neck function during jaw-opening/closing tasks. Thus, in jaw-opening to a predefined position, the head-neck component increased during pain. Previous studies have indicated that muscle spindle stimulation by vibration of the masseter muscle may influence jaw movement amplitudes, but the possible effect on the integrated jaw-neck function is unknown. The aim of this study was to investigate the effect of masseter muscle vibration on jaw-head movements during a continuous jaw-opening/closing task to a target position. Sixteen healthy men performed two trials without vibration (Control) and two trials with bilateral masseter muscle vibration (Vibration). Movements of the mandible and the head were registered with a wireless three-dimensional optoelectronic recording system. Differences in jaw-opening and head movement amplitudes between Control and Vibration, as well as achievement of the predefined jaw-opening target position, were analysed with Wilcoxon's matched pairs test. No significant group effects from vibration were found for jaw or head movement amplitudes, or in the achievement of the target jaw-opening position. A covariation between the jaw and head movement amplitudes was observed. The results imply a high stability for the jaw motor system in a target jaw-opening task and that this task was achieved with the head-neck and jaw working as an integrated system.

Place, publisher, year, edition, pages
2014. Vol. 232, no 11, 3501-3508 p.
Keyword [en]
Integrated jaw-neck function; Masseter muscle vibration; Proprioception; Jaw-opening accuracy; Motor strategy
National Category
Physiology
Identifiers
URN: urn:nbn:se:umu:diva-94534DOI: 10.1007/s00221-014-4037-3ISI: 000343916400012PubMedID: 25059909OAI: oai:DiVA.org:umu-94534DiVA: diva2:754817
Available from: 2014-10-13 Created: 2014-10-13 Last updated: 2017-12-05Bibliographically approved

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Wiesinger, BirgittaHäggman-Henrikson, BirgittaWänman, AndersLindkvist, Marie

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Wiesinger, BirgittaHäggman-Henrikson, BirgittaWänman, AndersLindkvist, Marie
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Department of OdontologyDepartment of Radiation Sciences
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