EMG burst presence probability: a joint time-frequency representation of muscle activity and its application to onset detection

Journal of Biomechanics
Jie LiuWilliam Zev Rymer

Abstract

The purpose of this study was to quantify muscle activity in the time-frequency domain, therefore providing an alternative tool to measure muscle activity. This paper presents a novel method to measure muscle activity by utilizing EMG burst presence probability (EBPP) in the time-frequency domain. The EMG signal is grouped into several Mel-scale subbands, and the logarithmic power sequence is extracted from each subband. Each log-power sequence can be regarded as a dynamic process that transits between the states of EMG burst and non-burst. The hidden Markov model (HMM) was employed to elaborate this dynamic process since HMM is intrinsically advantageous in modeling the temporal correlation of EMG burst/non-burst presence. The EBPP was eventually yielded by HMM based on the criterion of maximum likelihood. Our approach achieved comparable performance with the Bonato method.

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Citations

Jul 10, 2018·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Baohua HuYong Wang
May 13, 2020·Journal of Medical Engineering & Technology·Husamuldeen Khalid HameedLiyana Najwa Inche Mat
Dec 19, 2019·Medical & Biological Engineering & Computing·Hichem BengacemiAmmar Mesloub
Nov 6, 2020·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Sara HalakooShapour Jaberzadeh

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