A Study of Surface Electromyography Measurement of Facial Muscles in Normal Person

Abstract

Background or Objectives : The purpose of this study is to measure surface Electromyography(sEMG) of facial muscles in normal person and to find method for standardizing of sEMG's value. Methods : We measured 3points on face, frontalis muscle(GB14), zygomaticus muscle(SI18), orbicularis oris muscle(LI19) of 40 normal person by sEMG. 40 normal person consist with two groups, each 20 male, 20 female. Average age of subject was 26.50±4.79. SEMG instrument QEMG-4 XL was used. After training exercise of facial muscles, sEMG's root mean square value was measured once. Results : 1. In whole experimental group, frontalis muscle's both side average was 78.36±40.87, zygomaticus muscle's both side average was 84.70±49.81, orbicularis oris's both side average was 104.83±38.81. 2. Left side of Frontalis muscle, both side of zygomaticus muscle are high marked in male than female in statistically. 3. In whole experimental group, average of ratio comparing smaller value with bigger value in difference between left side and right side was 19.60±12.88 %. 4. Average of asymmetry index(AI) was 11.46±8.36 %. orbicularis oris muscle's average of AI had least difference was 8.95±7.50 %. zygomaticus muscle's average of AI had most difference was 13.95±8.90 %. Conclusions : The result of this study could provide useful information of field of sEMG is used in oriental medicine treatment of facial muscles. To assess efficacy of treatment in facial muscles, we need to standardize facial muscle's sEMG values by using AI, ratio comparing values and etc.

Difference between Right and Left Facial Surface Electromyography in Healthy People

“…As found in the results stated above, individual differences in RMS values of the sEMG in subjects of good health were large and the same large differences were found in range of standard deviation, while R-LV/HV or AI in subjects of good health shows relatively certain range of values. This comes down to the conclusion as stated in Lee et al [ 19 ] that RMS values were not suitable for determining conditions of subjects, rather comparisons using R-LV/HVs and AI values can be more reasonable method to determine whether a subject has a normal condition or not. Based on the conclusion, the results in this study can be utilized to assess abnormality of facial muscles and determine whether they fall within the normality.…”

“…Although there have been attempts to interpret results of the sEMG test on patients with facial paralysis by associating with the naked eye test, it was insufficient to represent the sEMG test with the smaller number of samples of 21 people. Another ongoing study on the sEMG measurements of 20 males and 40 females with good health when they move their facial parts was designed to draw biological electric features of the local specimen with good health but shows its limitation in that it fails to provide no classification other than classification by males and females as well as with the smaller number of specimen [ 18 , 19 ].…”

“…Although there have been many studies on sEMG of patents with facial paralysis, less studies have been reported on whether the indexes were different by sex, age, or parts of the body. In some study [ 9 ], there was a difference in facial sEMG values according to sex, but there was a limit of 40 small subjects. This study was to measure facial surface sEMG in subjects of good health aging between 20s and 60s to see any difference in the values depending on sex, age, or parts of the body.…”

A Study of the Electrical Properties of the Buccal Area using Facial Surface Electromyography※

“…In particular, there was only one clinical study related to facial nerve palsy. In Korea, Lee et al 7) described the effectiveness of the surface EMG in patients with facial nerve palsy. Kim et al TheAcupunctureVol.34No.2May2017 …”

Correlation Between Accompanying Symptoms of Facial Nerve Palsy, Clinical Assessment Scales and Surface Electromyography

“…SEMG is studied in Korean medicine to understand facial paralysis. Lee et al [12] investigated volunteers i.e., without facial paralysis, to understand the severity of symptoms and treatment effects for facial conditions/diseases. Moreover, Kim et al [13] studied the correlation between the clinical assessment scales and SEMG test results of facial nerve palsy, and determined that the ratio of measured SEMG values had a statistically significant negative correlation with the HBGS, and a positive correlation with the Y-score.…”