Correlation between electromyography and quantitative ultrasonography of facial muscles in patients with facial palsy.

Authors:
Gerd Fabian Volk
Gerd Fabian Volk
Jena University Hospital
Germany
Christian Leier
Christian Leier
Jena University Hospital
Orlando Guntinas-Lichius
Orlando Guntinas-Lichius
Jena University Hospital
Germany

Muscle Nerve 2016 May 5;53(5):755-61. Epub 2016 Feb 5.

Department of Otorhinolaryngology, Jena University Hospital, Lessingstrasse 2, D-07740, Jena, Germany.

Introduction: In this study we correlated results of ultrasonographic muscle thickness and contractility with facial electromyography (EMG) in patients with unilateral peripheral acute or chronic facial palsy.

Methods: Two hundred twenty measurements of 4 facial muscles (frontalis, orbicularis oculi, zygomaticus, and orbicularis oris) were performed in 44 patients.

Results: Facial muscle thickness at rest and during muscle contraction correlated best with EMG insertional activity, and facial muscle contractility correlated with EMG voluntary activity. The correlation was much higher at >14 days after onset of facial palsy. The orbicularis oris, followed by the frontalis muscle, showed the best correlation between ultrasound and EMG.

Conclusions: Quantitative ultrasound of facial muscles helps confirm the results of facial EMG and is of particular additional value in the first 14 days after onset when the reliability of EMG is low.

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May 2016
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References

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Guntinas-Lichius O. Prognostication of recovery time after acute peripheral facial palsy: a prospective cohort study
Volk et al.
BMJ Open 2013
An index for paresis and defective healing-an easily applied method for objectively determining therapeutic results in facial paresis (author's transl) [in German]
Stennert et al.
HNO 1977
Facial nerve grading system
House et al.
Otolaryngol Head Neck Surg 1985

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