Dong Y, Li B, Hu J, Widmalm SE, Zhang T, Lin M, Buvarp A, Zhou D. Kurtosis, a new variable with possible diagnostic value in analysis of jaw muscle surface EMG.
J Oral Rehabil 2021;
49:170-176. [PMID:
34902174 DOI:
10.1111/joor.13294]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 10/30/2021] [Accepted: 12/07/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND
There is a need for methods to compare differences of voltage levels and distribution anomalies in the study of skeletal muscle function. Calculating the kurtosis values has been found to be of value.
AIM
The aim was to record and analyse voltage and kurtosis levels of SEMG recorded bilaterally in the masseter and anterior temporalis areas during rest and clenching and to compare the kurtosis levels between controls and patients with TMJ disc dysfunction.
MATERIAL AND METHODS
Twenty-three healthy subjects and 21 patients with TMJ disc dysfunction were taken part in this study. Recordings were made with the BioPAK EMG System. Gain was adjusted to record the data within the range of ±2000 µV. SEMG was recorded in four facial areas, the right masseter, left masseter, right anterior temporalis, and left anterior temporalis areas. Kurtosis levels of SEMG, at clenching with maximal force, and mandibular rest, were compared between the control and patient groups.
RESULTS
The kurtosis levels of clenches were significantly higher in patients in all four areas with sensitivity, 38.1% to 61.9%, and specificity, 82.6% to 100.0%. No differences were found in kurtosis levels during mandibular rest.
CONCLUSION
The results support that kurtosis values of SEMG recorded during clenching have a potential diagnostic interest.
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