Journal
CLINICAL NEUROPHYSIOLOGY
Volume 129, Issue 2, Pages 341-344Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.clinph.2017.11.012
Keywords
AMPS; MUNIX; MUNE; ALS; Correlation
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Objective: The aim of this study was to evaluate how the motor unit number index (MUNIX) is related to the adapted multiple point stimulation (AMPS) technique. Methods: MUNIX and AMPS technique were prospectively performed on thenar muscles in 20 consecutive patients referred to our neurophysiological laboratory with the clinical diagnosis of a possible motoneurone disorder (MND). The clinical and paraclinical assessment confirmed the diagnosis of MND in 13 out of 20 patients, amyotrophic lateral sclerosis (ALS) in 9 (with MND group). In the other 7 patients, there were neither evidence of MND, nor of any peripheral nervous system disease (without MND group). Results: AMPS and MUNIX data were significantly (p < 0.001) lower in patients with MND than in patients without MND. There was a strong significant positive linear correlation between AMPS and MUNIX values (n = 20; R = 0.83; p < 0.01). Conclusion: Both MUNIX and AMPS methods could serve as a reliable marker to document the motor unit loss. (C) 2017 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
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