Electromyography and asymmetry index of masticatory muscles in undergraduate students with temporomandibular disorders

Authors

  • Gisele Harumi Hotta Universidade de São Paulo - USP
  • Ana Izabela Sobral de Oliveira Universidade de São Paulo - USP
  • Anamaria Siriani de Oliveira Universidade de São Paulo - USP
  • Cristiane Rodrigues Pedroni Universidade Estadual Paulista - UNESP

DOI:

https://doi.org/10.20396/bjos.v14i2.8640835

Keywords:

Electromyography, Evaluation, Stomatognathic system

Abstract

Aim: To compare the electromyographic activity and the asymmetry index among degrees of severity of temporomandibular disorders (TMD). Methods: Surface electromyography (EMG) of the right and left masseter and temporalis muscles was performed in 126 undergraduate students at rest and at maximal voluntary contraction. Three measurements were performed for five seconds of maximal contraction and mandibular rest. The degree of temporomandibular dysfunction was identified according to the Fonseca anamnestic index. The analysis of the asymmetry index for two pairs of muscles during maximal voluntary contraction was based on the asymmetry index proposed by Naeije, McCarrol and Weijs (1989). Results: 48.41% of the sample had mild TMD, followed by volunteers without TMD (26.98%), moderate TMD (19.05%) and severe (5.56%). The survey results show absence of correlation between the Fonseca anamnestic index and electromyographic activity at rest and at maximal voluntary contraction in undergraduate students in both muscles (p>0.05) and the asymmetry index did not differ between the analyzed groups. Conclusions: For the population of undergraduate students, there is no evidence that the presence and severity of TMD influence the EMG activity of masseter and temporalis muscles and the muscle asymmetry index at rest and maximal voluntary contraction.

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Author Biographies

Gisele Harumi Hotta, Universidade de São Paulo - USP

Universidade de São Paulo - USP, Ribeirão Preto Medical School, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto, SP.

Ana Izabela Sobral de Oliveira, Universidade de São Paulo - USP

Universidade de São Paulo - USP, Ribeirão Preto Medical School, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto, SP.

Anamaria Siriani de Oliveira, Universidade de São Paulo - USP

Universidade de São Paulo - USP, Ribeirão Preto Medical School, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto, SP.

Cristiane Rodrigues Pedroni, Universidade Estadual Paulista - UNESP

Universidade Estadual Paulista - UNESP, School of Philosophy and Sciences, Department of Physical Terapy and Occupational Therapy, Marilia, SP.

Published

2015-06-30

How to Cite

1.
Hotta GH, Oliveira AIS de, Oliveira AS de, Pedroni CR. Electromyography and asymmetry index of masticatory muscles in undergraduate students with temporomandibular disorders. Braz. J. Oral Sci. [Internet]. 2015 Jun. 30 [cited 2022 Nov. 26];14(2):176-81. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640835

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