کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3042557 1184954 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Usefulness of intermuscular coherence and cumulant analysis in the diagnosis of postural tremor
ترجمه فارسی عنوان
مفید بودن انحطاط بین عضلانی و تحلیل انباشتگی در تشخیص ترموال موضعی
کلمات کلیدی
لرزش ضروری، لرزش پارکینسونی، لرزش فیزیولوژیک پیشرفته، لرزش عملکردی، الکترومیوگرافی، انسجام
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی عصب شناسی
چکیده انگلیسی


• Intermuscular coherence was found to be highest in parkinsonian tremor, intermediate in functional and essential tremor, and weakest in enhanced physiological tremor.
• Cumulant analysis revealed some distinct EMG activity patterns in essential tremor and Parkinson’s disease patients.
• Coherence and cumulant analysis may be of additional value in the diagnostic work-up of postural tremor.

ObjectiveTo investigate the potential value of two advanced EMG measures as additional diagnostic measures in the polymyographic assessment of postural upper-limb tremor.MethodsWe investigated coherence as a measure of dependency between two EMG signals, and cumulant analysis to reveal patterns of synchronicity in EMG activity in muscle pairs. Eighty datasets were analyzed retrospectively, obtained from four groups: essential tremor (ET), Parkinson’s disease (PD), enhanced physiological tremor (EPT), and functional tremor (FT).ResultsIntermuscular coherence was highest in the PD group (0.58), intermediate in FT (0.43) and ET (0.40), and weakest in EPT (0.16) (p = 0.002). EPT patients could be distinguished by low coherence: coherence <0.18 in the wrist + elbow extensors differentiates EPT in this sample with a sensitivity of 86% and specificity of 84%.Cumulant analysis showed predominantly alternating activity between wrist and elbow extensor in ET patients, while a more synchronous pattern was predominant in PD, EPT and FT (p = 0.008). EMG activity in wrist and elbow flexors tended to be more synchronous in PD (p = 0.059).ConclusionOur results suggest that coherence and cumulant analysis may be of additional value in the diagnostic work-up of postural tremor.SignificanceThese additional measures may be helpful in diagnosing difficult tremor cases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Clinical Neurophysiology - Volume 126, Issue 8, August 2015, Pages 1564–1569
نویسندگان
, , , , ,