Motor Unit Number Index (MUNIX ) in Control Children: Reference Values and Reliability
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· 2025
· Open Access
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· DOI: https://doi.org/10.1002/mus.28470
Introduction/Aims The motor unit number index (MUNIX) is recognized as a reliable electrophysiological biomarker, and reference values are available for healthy adults but not for children. The aim of this study was to determine reference MUNIX values in healthy children. Methods Sixty control children (28 females) were grouped as under 5 years (n 1 = 16), 5–10 years (n 2 = 15), 10–15 years (n 3 = 20), and 15–17 years (n 4 = 9). MUNIX measurements were performed by an experienced and an inexperienced investigator in the abductor digiti minimi (ADM) and abductor pollicis brevis (APB) on both sides when possible. Results The APB MUNIX increased by 6.5 [95% confidence interval, 3.2–9.7] per year of age, 1.0 [0.5–1.5] per cm, and 1.7 [0.4–4.0] per kg ( p < 0.001 in each case), but was not independently associated with either of these three variables in multivariable analysis. The APB compound muscle action potential (CMAP) increased by 0.42 [0.30–0.52] per year of age, 0.06 [0.04–0.08] per cm, and 0.11 [0.07–0.14] per kg ( p < 0.001 in each case), and increased with age independently of height and weight at borderline significance ( p = 0.065). Measurement reproducibility was high for the experienced investigator, but lower between the experienced and the inexperienced investigator. Discussion The high intra‐investigator reproducibility for the experienced investigator indicates that these parameters are useful electrophysiological biomarkers for disease progression and potential treatment response.
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- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/mus.28470
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- OA Status
- hybrid
- Cited By
- 1
- References
- 20
- Related Works
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- OpenAlex ID
- https://openalex.org/W4412516574
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https://openalex.org/W4412516574Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1002/mus.28470Digital Object Identifier
- Title
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Motor Unit Number Index (
MUNIX ) in Control Children: Reference Values and ReliabilityWork title - Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2025Year of publication
- Publication date
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2025-07-21Full publication date if available
- Authors
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C. Boulay, Émilien Delmont, Frédérique Audic, C. Halbert, Sébastien Pesenti, B. Chabrol, Béatrice Desnous, Shahram AttarianList of authors in order
- Landing page
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https://doi.org/10.1002/mus.28470Publisher landing page
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/mus.28470Direct link to full text PDF
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hybridOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/mus.28470Direct OA link when available
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Reliability (semiconductor), Index (typography), Motor unit, Medicine, Computer science, Physics, Anatomy, World Wide Web, Power (physics), Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
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10Other works algorithmically related by OpenAlex
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