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Reference values for jitter recorded by concentric needle electrodes in healthy controls: A multicenter study
Author(s) -
Stålberg Erik,
Sanders Donald B.,
Ali Sajjad,
Cooray Gerald,
Leonardis Lea,
Löseth Sissel,
Machado Flavia,
Maldonado Antonio,
MartinezAparicio Carmen,
Sandberg Arne,
Smith Benn,
Widenfalk Johan,
Aris Kouyoumdjian João
Publication year - 2016
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24750
Subject(s) - jitter , concentric , medicine , reference values , physical medicine and rehabilitation , anatomy , audiology , mathematics , computer science , telecommunications , geometry
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. Muscle Nerve 53: 351–362, 2016