Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section
Main articleRepetitive nerve stimulation of anconeus in the assessment of neuromuscular transmission disorders☆
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Cited by (43)
Clinical and electrophysiological evaluation of myasthenic features in an alpha-dystroglycanopathy cohort (FKRP-predominant)
2020, Neuromuscular DisordersCitation Excerpt :The mean CMAP amplitude at baseline of the anconeus and trapezius muscles were 4.624 mV (SD = 3.164) CI (95%) = 3.42–5.827 and 3.353 mV (SD = 1.799) CI (95%) = 2.641–4.065, respectively. A significant decrement (>10%) in the CMAP amplitude between the first and fourth, and first and fifth, responses was observed in Patient #23 only (Fig. 2) whose baseline CMAP amplitudes for anconeus and trapezius were 4.1 and 7.84 mV, respectively, and within normal range according to reported reference values [11,14–16]. This patient was treated with pyridostigmine 60 mg twice per day and prn, but he did not experience any significant benefit during two months on treatment and elected to discontinue it.
Standards for quantification of EMG and neurography
2019, Clinical NeurophysiologyClinical neurophysiology of neuromuscular junction disease
2019, Handbook of Clinical NeurologyCitation Excerpt :Near-nerve stimulation with a monopolar needle requires less stimulus intensity and duration compared to the surface technique, is less contaminated by movement of stimulating electrodes, and is considerably more comfortable for patients (Sanders, 1993). Anconeus recordings with radial RNS are well tolerated by patients, rarely contaminated by movement artifact, and equally as sensitive as deltoid RNS testing in generalized MG (Kennett and Fawcett, 1993). RNS testing of craniobulbar muscles improves diagnostic sensitivity in many patients with MG.
A reappraisal of diagnostic tests for myasthenia gravis in a large Asian cohort
2017, Journal of the Neurological SciencesCitation Excerpt :However, both muscles were found to be of similar sensitivities in recent evaluations [12], [13]. In general, most studies, including ours, do indicate that RNS has a superior specificity above 80% [14–16]. Among various electrophysiology methods, we have used SFEMG of the orbicularis oculi, a method which is very operator-dependent and which is not uniformly employed by all researchers.
Electrophysiologic Study of Disorders of Neuromuscular Transmission
2012, Aminoff's Electrodiagnosis in Clinical NeurologyA synonymous CHRNE mutation responsible for an aberrant splicing leading to congenital myasthenic syndrome
2007, Neuromuscular DisordersCitation Excerpt :Informed written consent was obtained in accordance with a study protocol approved by the Ethics Committee of Pitié-Salpêtrière Hospital (CCPPRB #93-02). Neuromuscular transmission was tested by 3 Hz repetitive nerve stimulation studies, using standard electrodiagnostic methods [16,17], with skin recording electrodes positioned to maximize CMAP amplitude. Supramaximal stimulation of the appropriate nerve (0.3 ms duration and 20–30% greater intensity than that needed for maximum CMAP amplitude) was obtained using a bipolar bar electrode.
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Preliminary reports of this work have been published in abstract form (Kennett and Fawcett 1990, 1991).