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- W2598955873 abstract "The ability of surface and needle electromyographic (EMG) spike shape measures to match changes in motor unit recruitment, firing rate, and synchronization during force gradation, were compared. The purpose of the study was to determine the force level at which the surface EMG spike shape measures no longer parallel their indwelling analogues. Secondarily, the impact of the noise rejection criterion on the sensitivity of the spike shape measures was examined. Maximal isometric elbow flexion ramp contractions were performed while recording surface and needle EMG from the biceps brachii. Spike shape measures were calculated in 500 ms epochs over the duration of the ramp contraction. The spike threshold for needle EMG spike detection was varied to examine the effect of the algorithm’s selectivity. The pattern of change across force levels between surface and needle EMG measures was compared. Spike detection resulted in the same pattern of change for both surface and needle amplitude measures over the gradation of force. Frequency measures and mean number of peaks per spike (MNPPS) were affected by electrode-source distance and spike threshold. Surface and needle frequency measures changed in parallel to 50% MVC while the MNPPS plateaued at 50–55% MVC. Spike shape analysis of surface EMG can track changes in the interference pattern produced by recruitment and rate-coding up to 50% MVC." @default.
- W2598955873 created "2017-04-07" @default.
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- W2598955873 date "2017-07-01" @default.
- W2598955873 modified "2023-09-27" @default.
- W2598955873 title "Spike shape analysis for the surface and needle electromyographic interference pattern" @default.
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- W2598955873 doi "https://doi.org/10.1016/j.bspc.2017.03.006" @default.
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