Kurtosis, a new variable with possible diagnostic value in analysis of jaw muscle surface EMG. (30th December 2021)

• Record Type: Journal Article
• Authors: Dong, Yan; Li, Boxiu; Hu, Jianlai; Widmalm, Sven E; Zhang, Tongsheng; Lin, Min; Buvarp, Anders; Zhou, Dong
• Other Names: Fu Kai‐Yuan guestEditor.; Wang Kelun guestEditor.; Wang Mei‐Qing guestEditor.; Cao Ye guestEditor.
• Is Part Of: Journal of oral rehabilitation. Volume 49:Number 2(2022)
• Page Start: 170
• Page End: 176
• Publication Date: 2021-12-30
• Subjects: amplifier gain -- Excessive kurtosis -- masseter muscle area -- sensitivity -- specificity -- surface EMG -- TMD; Dentistry -- Periodicals; Prosthodontics -- Periodicals; 617
• DOI: 10.1111/joor.13294
• Languages: English
• ISSNs: 0305-182X

Abstract

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. Abstract : This article studied voltage levels and distribution anomalies with kurtosis values in control and TMJ disc dysfunction subjects. Kurtosis values are higher in patients with disc dysfunction than in healthy subjects and may be as a potential diagnostic value to evaluate mastication muscle function.