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Motor unit number index: Guidelines for recording signals and their analysis
Natus Med Inc, Hopewell Jct, NY USA.
Med Coll Wisconsin, Milwaukee, WI 53226 USA.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Klinisk neurofysiologi. Univ Hosp, Uppsala, Sweden.
Kantonsspital St Gallen, St Gallen, Switzerland.
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2018 (Engelska)Ingår i: Muscle and Nerve, ISSN 0148-639X, E-ISSN 1097-4598, Vol. 58, nr 3, s. 374-380Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Introduction: This study proposes guidelines for motor unit number index (MUNIX) recording and analysis. Methods: MUNIX was measured in control participants and in patients with amyotrophic lateral sclerosis. Changes in MUNIX values due to E1 electrode position, number of surface electromyography interference pattern (SIP) epochs, SIP epoch duration, force of contraction, and outlier data points were investigated. Results: MUNIX depends on optimized compound muscle action potential (CMAP) amplitude. Individual muscles showed variations when the number of epochs was low or when the SIP duration was short. Longer SIP duration allowed better recognition of artifacts. MUNIX results were affected by SIP values at all force levels but was more affected when SIP area was low. Discussion: We recommend changing the E1 electrode position to maximize CMAP amplitude. Twenty or more SIP signals of 500-ms duration should be recorded by using force levels ranging from slight to maximum. Traces should be reviewed to identify and exclude signals with tremor or solitary spikes.

Ort, förlag, år, upplaga, sidor
2018. Vol. 58, nr 3, s. 374-380
Nyckelord [en]
artifacts, compound muscle action potential, guidelines, motor unit number index, MUNIX, surface EMG interference pattern, tremor
Nationell ämneskategori
Fysiologi
Identifikatorer
URN: urn:nbn:se:uu:diva-365670DOI: 10.1002/mus.26099ISI: 000444079300009PubMedID: 29427557OAI: oai:DiVA.org:uu-365670DiVA, id: diva2:1263175
Tillgänglig från: 2018-11-14 Skapad: 2018-11-14 Senast uppdaterad: 2018-11-14Bibliografiskt granskad

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