1. Proposal of surface electromyography signal acquisition protocols for masseter and temporalis muscles
- Author
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Matilde da Cunha Gonçalves Nojima, Marco Antonio Cavalcanti Garcia, Luciana Duarte Caldas, and Ana Sabaneeff
- Subjects
Intraclass correlation ,lcsh:Biotechnology ,Biomedical Engineering ,Electromyography ,Mandibular first molar ,Masseter muscle ,03 medical and health sciences ,0302 clinical medicine ,Surface electrodes ,lcsh:TP248.13-248.65 ,Occlusion ,medicine ,Temporalis muscle ,Mathematics ,Orthodontics ,Reproducibility ,lcsh:R5-920 ,medicine.diagnostic_test ,030206 dentistry ,Oral physiology ,Bite force quotient ,Face ,lcsh:Medicine (General) ,030217 neurology & neurosurgery ,Student's t-test - Abstract
Introduction The aim of this study was to propose a method of electrodes positioning on the superficial masseter and anterior temporalis muscles for surface electromyographic (sEMG) recordings in order to overcome some known methodological constraints. Methods Fifteen volunteers with normal occlusion participated in two experimental sessions within a 7 day-period. Surface electrodes were placed on two different locations that were based on palpable and individual anatomical references. Surface EMG signals (2000 Hz per channel; A/D: 16 bits; gain: 2000 X; band-pass filter: 20-500 Hz) were recorded under three conditions: mandibular rest position, 30% and 100% of maximum voluntary bite force. Three measurements of maximal bite force were taken by using a force transducer positioned over the lower right first molar region and the highest record was taken into account. The root mean square value was considered for analysis. Intraclass correlation coefficients (ICCs), paired t test, and the Bland-Altman method comprised the statistical analyses. The level of significance was set at 0.05. Results ICC records for right and left masseter and anterior temporalis muscles at T0 (first sEMG record) and T7 (second sEMG record) intervals were significantly different (p
- Published
- 2017