A preliminary investigation of reproducibility of EMG signals during daytime masticatory muscle activity using a portable EMG logging device

Katsuhiro Omoto; Shuji Shigemoto; Yoshitaka Suzuki; Mayumi Nakamura; Kazuo Okura; Keisuke Nishigawa; Nami Goto; Omar Marianito Maningo Rodis; Yoshizo Matsuka

doi:10.1016/j.jelekin.2015.04.012

A preliminary investigation of reproducibility of EMG signals during daytime masticatory muscle activity using a portable EMG logging device

J Electromyogr Kinesiol. 2015 Aug;25(4):603-11. doi: 10.1016/j.jelekin.2015.04.012. Epub 2015 May 14.

Authors

Katsuhiro Omoto¹, Shuji Shigemoto², Yoshitaka Suzuki¹, Mayumi Nakamura¹, Kazuo Okura¹, Keisuke Nishigawa¹, Nami Goto¹, Omar Marianito Maningo Rodis³, Yoshizo Matsuka⁴

Affiliations

¹ Department of Stomatognathic Function and Occlusal Reconstruction, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan.
² Department of Stomatognathic Function and Occlusal Reconstruction, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan; Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan.
³ Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan.
⁴ Department of Stomatognathic Function and Occlusal Reconstruction, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan. Electronic address: matsuka@tokushima-u.ac.jp.

PMID: 26004628
DOI: 10.1016/j.jelekin.2015.04.012

Abstract

Continuous parafunctional masseter muscle activities (MMA) that are associated with daytime bruxism have been suspected to be one of the main pathoetiology for orofacial pain. The purpose of this study was to examine the long-term stability and reliability of daytime EMG measurement of MMA using a portable device (Actiwave; CamNtech Ltd). Daytime masseter muscle EMG of five subjects were recorded for four days in their normal living environment. There was no significant time dependent effect on EMG amplitude during recording period. A total of 4923 MMA events were detected in all analysis periods (129.4h) and classified into phasic type (1209 events, 24.6%), tonic type (1759 events, 37.0%), and mixed type (1377 events, 28.0%). There was no significant difference in the number of occurrence among three MMA types. With respect to the duration and peak MMA, there were significant differences among three MMA types. The result of this study indicated that Actiwave can be used to measure MMA events during daytime with high stability and reliability under the normal living environment and it was suspected that parafunctional habits may be associated with the occurrence patterns of MMA during daytime.

Keywords: Clenching; Daytime masseter muscle activity; Teeth grinding.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adult
Bruxism / diagnosis
Bruxism / physiopathology
Electromyography / instrumentation
Electromyography / methods*
Electromyography / standards*
Humans
Male
Masticatory Muscles / physiology*
Masticatory Muscles / physiopathology
Monitoring, Ambulatory / instrumentation
Monitoring, Ambulatory / methods*
Monitoring, Ambulatory / standards*
Reproducibility of Results
Time Factors