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Plasticity in corticomotor pathways linked to a jaw protrusion training task: Potential implications for management of patients with obstructive sleep apnea.
Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Japan.
Hammel Neurorehabilitation Centre and University Research Clinic, Denmark; Department of Clinical Medicine, Aarhus University, Denmark; SS Dental College and Hospital, JSS Academy of Higher Education and Research, Mysore, India.
Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Japan; Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Denmark.
Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Denmark; Department of Geriatric Dentistry, Osaka Dental University, Japan.
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2020 (English)In: Brain Research, ISSN 0006-8993, E-ISSN 1872-6240, Vol. 1749, article id 147124Article in journal (Refereed) Published
Abstract [en]

This study investigated the effect of a repeated and standardized jaw protrusion training (JPT) task on corticomotor excitability as assessed by motor evoked potentials (MEPs) in masseter and tongue muscle with the use of transcranial magnetic stimulation (TMS). Sixteen healthy participants performed three series of a standardized JPT task on three consecutive days. Each day participants performed 41-min of JPT consisting of three series. In all series, participants were instructed to target 50% and 100% of the maximum jaw protrusion positions. In the first and third series without any feedback but during the second series, participants were provided a custom-made mandibular advancement device to help achieve the correct protruded position. Single pulse TMS was applied to elicit MEPs from right masseter, right tongue and right first dorsal interosseous muscles (FDI) (as control), pre and post-task on Day-1 and -3. Masseter MEPs and tongue MEPs were significantly dependent on stimulus intensity (P < 0.001) and on task session (P < 0.001). Amplitude of masseter and tongue MEPs at post-task Day-3 were significantly higher compared to baseline values (pre-task Day-1) (P < 0.005). FDI MEPs were dependent on stimulus intensity only (P < 0.001) but not on task session (P = 0.677). Our novel findings suggest that participants performing an active and repeated JPT task demonstrate neuroplasticity in terms of increased corticomotor excitability not only in masseter muscles but also in tongue muscles. This finding may have implications for patients with obstructive sleep apnea treated by a mandibular advancement device where the lower jaw is passively held in a protruded position.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 1749, article id 147124
Keywords [en]
Corticomotor control, Jaw protrusion, Motor evoked potentials, Neuroplasticity, Transcranial magnetic stimulation
National Category
Dentistry
Identifiers
URN: urn:nbn:se:mau:diva-22018DOI: 10.1016/j.brainres.2020.147124ISI: 000583926400004PubMedID: 33010208Scopus ID: 2-s2.0-85092085045OAI: oai:DiVA.org:mau-22018DiVA, id: diva2:1484182
Available from: 2020-10-28 Created: 2020-10-28 Last updated: 2024-06-17Bibliographically approved

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Svensson, Peter

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