Reference values for jitter recorded by concentric needle electrodes in healthy controls: A multicenter study

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Abstract

Introduction: The aim of this study was to create reference values for jitter measured with concentric needle electrodes. Methods: Operators worldwide contributed recordings from orbicularis oculi (OO), frontalis (FR), and extensor digitorum (ED) muscles in healthy controls. Criteria for acceptable signal quality were agreed upon in advance. Fifteen or 20 recordings of acceptable quality from each muscle were required for voluntary and electrical stimulation recordings, respectively. Results: Recordings from 59 to 92 subjects were obtained for each muscle and activation type. Outlier limits for mean consecutive difference and individual jitter data for voluntary activation were: OO, 31 and 45 μs; FR, 28 and 38 μs; ED, 30 and 43 μs; and for electrical stimulation they were: OO, 27 and 36 μs; FR, 21 and 28 μs; ED, 24 and 35 μs. Conclusion: Reference jitter values from concentric needle electrode recordings were developed from signals of defined quality while seeking to avoid creating supernormal values.

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Stålberg, E., Sanders, D. B., Ali, S., Cooray, G., Leonardis, L., Löseth, S., … Aris Kouyoumdjian, J. (2016). Reference values for jitter recorded by concentric needle electrodes in healthy controls: A multicenter study. Muscle and Nerve, 53(3), 351–362. https://doi.org/10.1002/mus.24750

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