Vibratory stimulus to the masseter muscle impairs the oral fine motor control during biting tasks |
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| Institution: | 1. Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden;2. Department of Disability and Oral Health, Osaka Dental University Hospital, Osaka, Japan;3. Department of Organismal Biology and Anatomy, University of Chicago, IL, United States;4. Department of Odontology, Clinical Oral Physiology, Umeå University, Umeå, Sweden;5. Department of Integrative Medical Biology, Umeå University, Umeå, Sweden;6. Section of Orofacial Pain and Jaw Function, Institute for Odontology and Oral Health, Aarhus University, Denmark;7. SCON| Scandinavian Center for Orofacial Neurosciences, Sweden;1. Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, TMDU, Tokyo, Japan;2. Oral Diagnosis and General Dentistry, University Hospital of Dentistry, Tokyo Medical and Dental University, TMDU, Tokyo, Japan;1. Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan;2. Volpe Research Center, ADA Foundation, Gaithersburg, MD, USA;3. Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan;4. Division of Fixed Prosthodontics, Meikai University School of Dentistry, Sakado, Japan;1. Occlusion and Removable Prosthodontics, Okayama University Hospital, Okayama, Japan;2. Department of Occlusal and Oral Functional Rehabilitation, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan;1. Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan;2. Department of Clinical Pathophysiology, Tokyo Dental College, Tokyo, Japan;3. Department of Global Dental Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan;4. Department of Periodontal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan |
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| Abstract: | PurposeTo investigated the effect of vibratory stimulus on masseter muscles during oral fine motor biting tasks.MethodsSixteen healthy individuals (age: 24.5 ± 2.4 years) participated in experiment I during which the participants were asked to “hold and split” half a roasted peanut placed on a force transducer with their front teeth. The participant performed ten series with ten trials of the “hold and split” behavioral task while vibratory stimulus was applied on the masseter muscle every alternate series. Further, fourteen participants participated (age: 25.2 ± 4.8 years) in experiment II during which they performed a series each of the behavioral task at baseline, an adjusted baseline without and with vibration as well as with and without visual feedback. Hold and split forces along with the variability of hold force and duration and force rate during the split were measured.ResultsThe results of the study showed an increase in the magnitude of the hold force (P = 0.002), force rate during the split (P < 0.001) and a significant decrease in the duration of split (P < 0.001) due to the vibratory stimulus. However, there was no significant effect of the vibratory stimulus on the variability of hold forces (P = 0.879) or mean split force (P = 0.683) during the “hold and split” behavioral task. The results of experiment II also showed an increase in hold force due to the vibratory stimulus (P < 0.001).ConclusionsVibratory stimulus to the masseter muscles impairs the oral force control during a standardized biting task and provide further insight into the sensorimotor regulation of the masticatory system. |
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| Keywords: | Periodontal mechanoreceptors Variability Visual feedback Proprioception Masseter muscle vibration |
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