CC BY-NC-ND 4.0 · Int Arch Otorhinolaryngol 2018; 22(04): 348-357
DOI: 10.1055/s-0037-1607335
Original Research
Thieme Revinter Publicações Ltda Rio de Janeiro, Brazil

The Contribution of Surface Electromyographic Assessment for Defining the Stage of Peripheral Facial Paralysis: Flaccid or Sequelae Stage

Daniele Fontes Ferreira Bernardes
1   Department of Otorhinolaryngology, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil
,
Ricardo Ferreira Bento
2   Department of Otolaryngology, Universidade de São Paulo, São Paulo, SP, Brazil
,
Maria Valeria Schimidt Goffi Gomez
3   Department of Otorhinolaryngology, Hospital das Clínicas da FMUSP, São Paulo, SP, Brazil
4   Department of Audiology, AC Camargo Cancer Center, São Paulo, SP, Brazil
› Institutsangaben
Weitere Informationen

Publikationsverlauf

10. März 2017

08. September 2017

Publikationsdatum:
26. Oktober 2017 (online)

Abstract

Introduction Surface electromyographic activity may not be symmetric, even in subjects with no facial paralysis history.

Objective To evaluate the contribution of the index of electromyographic (IEMG) activity in the identification of the two extremes of the facial paralysis course.

Methods Thirty-four subjects with unilateral peripheral facial paralysis were selected. A control group was composed of volunteers without a history of facial paralysis. The electromyographic assessment of the facial muscle was performed by placing surface electrodes during movements of the forehead, eyes and lips using MIOTEC equipment, such as the MIOTOOL (Miotec, Porto Alegre, Brazil) software. The electromyographic activity was also recorded in other channels during the primary activity to identify the presence of synkinesis. The statistical analysis was performed using the Statistical Package for Social Sciences for Macintosh (SPSS Inc, Chicago, IL, USA). The IEMG activity was obtained from the division of the electromyographic activity root mean square (RMS) values on both sides.

Results There was a statistically significant difference among the groups in all the analyzed indexes. The ocular-oral synkinesis in all patients must be correctly identified (with 100% sensitivity and specificity) using an IEMG activity of 1.62 as a cutoff point. The oral-ocular synkinesis must be correctly identified (93.3% sensitivity and 95.9% specificity) using the IEMG activity of 1.79 as a cutoff point.

Conclusion The IEMG activity is below the normal scores in patients in the flaccid stage, whereas patients in the sequelae stage can either show normal values or values above or below the normal scores. The IEMG activity was shown to have high sensitivity and specificity in the identification of synkinesis.

 
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