Clinical Use of Qualitative Electromyography in the Evaluation of Jaw Muscle Function: A Practitioner's Guide

Retracted: ‘The effects of Duchenne muscular dystrophy on the performance of the stomatognathic system: case–control study’, by Ferreira B., Da Silva G.P., Gonçalves C.R., et al.

“…to Widmalm et al, 28 the muscles of the stomatognathic system of healthy individuals should be able to develop activity that is converged in force by the muscular system. With the proper coordination, the system promotes relaxation during jaw rest.…”

“…These data were similar to those seen in individuals with related disorders. 29,30 According to Widmalm et al 28 and Michelotti et al, 31 when individuals have sealed lips and with minimal dental contact, elastic forces from the skeletal muscles should be sufficient to keep the jaw positioned properly: however, this activity should be minimal. In the Duchenne group, a greater activation of the temporalis muscle during rest was observed, emphasizing the atypically high level of electromyographic activity in this group which can promote disorders in the system over time.…”

Alterações no controle motor mandibular e cervical de crianças com paralisia cerebral

“…Some authors admit the usual an index of symmetry for healthy adults at least 82 ± 1.34% 18 and others determined the usual parameters of MA symmetry of 87.11 ± 1.60% and AT 88,11 ± 1.45% 19 . Therefore, some degree of asymmetrical activity should be considered in most individuals, since the skull is rarely symmetrical and muscular system to try to redress this skeletal imbalance generates also asymmetric forces 20 .…”

Analysis of Changes in Bilateral Masseter and Anterior Temporalis Muscle Efficiency in Complete Denture Wearers. –An Emg Study.

“…At present, data does not permit a characterization based on quality of a muscle activity because of the lack of standardization in recording techniques and the obvious difficulty in expressing the resultant Electromyograms in simple qualitative terms. The two main types of electrodes used for the study of muscle dynamics are surface (or ‗skin') electrodes and deep electrodes (usually wire or needle) [13]. Deep electrodes: the electrodes inserted within the muscle by using two thin-coated wire filaments, which introduced by means of a hypodermal needle.They are superior to surface electrodes, as the quality of the electromyogram is better.…”