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KMID : 0860920180200020084
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2018 Volume.20 No. 2 p.84 ~ p.90
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Correlation between Surface Electromyography and Conventional Electromyography in Facial Nerve Palsy
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Jang Ha-Neul
Yoo Seung-Don
Lee Jong-Ha
Soh Yun-Soo
Kim Dong-Hwan
Chon Jin-Mann
Lee Seung-Ah
Kim Hee-Sang
Yun Dong-Hwan
Kwon Jung-Ho
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Abstract
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Objective: To assess the correlation between surface electromyography (SEMG) and conventional EMG in patients with facial nerve palsy. Additionally, compare the discomfort and the time required by the patients in two methods.
Method: 36 patients with facial palsy were given nerve conduction studies (NCS) via conventional EMG. Then, the peak root mean square (RMS) values were obtained from the SEMG. We also recorded visual analogue scale (VAS), House- Brackmann scale, and the time required for the examination.
Results: Pearson’s correlation coefficient between the amplitude loss ratio of the RMS values obtained by SEMG compared to the unaffected side (RSEMG) and the amplitude loss ratio of CMAP amplitudes compared to the unaffected side (RCMAP) was 0.567 at the frontalis, 0.456 at the orbicularis oculi, 0.393 at the nasalis, and 0.437 at the orbicularis oris. An increase in RSEMG is positively correlated with an increase in RCMAP. The mean VAS score with conventional EMG was 3.55 ± 1.42, whereas that experienced when using SEMG was 0.11 ± 0.52 and the mean time required for conventional EMG was 610 ± 103.84 seconds, while that required for SEMG was 420 ± 86.32 seconds.
Conclusion: This study demonstrated a significant positive correlation between facial muscle activities as measured by SEMG and conventional EMG in patients with facial nerve palsy. SEMG has the benefits of being more comfortable and faster when diagnosing facial palsy.
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KEYWORD
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electromyography, facial paralysis, surface electromyography
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