Concentric needle jitter on stimulated Orbicularis Oculi in 50 healthy subjects
2011 (English)In: Clinical Neurophysiology, ISSN 1388-2457, E-ISSN 1872-8952, Vol. 122, no 3, 617-622 p.Article in journal (Refereed) Published
Objectives: The aim of this study was to estimate the jitter parameters in healthy controls in stimulated Orbicularis Oculi (OOc) muscle using concentric needle electrode (CNE). Methods: Fifty healthy subjects, 13 males and 37 females (21-56 years, mean age of 38 +/- 9.2 years) were studied. The zygomatic branch of facial nerve was stimulated with a bar electrode. Jitter was expressed as the mean consecutive difference (MCD). Filter settings 1000 Hz-10 kHz. Results: The mean MCD from individual studies (n = 50, Gaussian distribution) was 21.5 +/- 1.99 mu s (median = 21 mu s), ranging from 17.8 to 26 mu s (upper limit, 97.5%, 25.5 mu s). The mean and median MCD from all potentials (n = 1500, non-Gaussian distribution) were 21.6 and 21 mu s, ranging from 7.1 to 39 mu s (upper limit, 97.5%, 33.4 mu s). Conclusions: Suggested practical limits in the OOc for mean MCD was 26 mu s and for outliers 34 mu s. Significance: Stimulation jitter recordings with CNE could be used in practice but borderline findings should be judged with great caution until larger database obtained with uniform setting available.
Place, publisher, year, edition, pages
2011. Vol. 122, no 3, 617-622 p.
Single fiber electromyography, Jitter, Concentric needle electrode, Stimulation jitter, Orbicularis Oculi
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-146886DOI: 10.1016/j.clinph.2010.07.012ISI: 000286456300028PubMedID: 20708431OAI: oai:DiVA.org:uu-146886DiVA: diva2:399250