EMG filling analysis, a new method for the assessment of recruitment of motor units with needle EMG
| dc.contributor.author | Mariscal Aguilar, Cristina | |
| dc.contributor.author | Navallas Irujo, Javier | |
| dc.contributor.author | Malanda Trigueros, Armando | |
| dc.contributor.author | Recalde Villamayor, Silvia | |
| dc.contributor.author | Rodríguez Falces, Javier | |
| dc.contributor.department | Ingeniería Eléctrica, Electrónica y de Comunicación | es_ES |
| dc.contributor.department | Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza | eu |
| dc.contributor.department | Institute of Smart Cities - ISC | en |
| dc.date.accessioned | 2025-04-28T09:38:25Z | |
| dc.date.issued | 2025-02-20 | |
| dc.date.updated | 2025-04-28T09:25:45Z | |
| dc.description.abstract | Objectives: The progression of recruitment of motor unit potentials (MUPs) during increasing voluntary contraction can provide important information about the motor units (MUs) innervating a muscle. Here, we described a method to quantitate the recruitment level of the intramuscular electromyographic (iEMG) signal during an increasing force level. Methods: Concentric needle EMG signals were recorded from the tibialis anterior of healthy subjects as force was gradually increased from 0 to maximum force. The iEMG filling process was analyzed by measuring the EMG filling factor (FF), calculated from the mean rectified iEMG and the root mean square iEMG. Results: (1) The iEMG activity at low contraction forces was “discrete” (FF<0.3) for all participants. (2) The iEMG activity at maximal effort was “full” (FF>0.5) for 83 % of the participants, whereas it was “incompletely-reduced” (0.3<FF< 0.5) for 17 % of the participants. (3) The FF increased rapidly for forces up to 20 % MVC, and then levelled off for higher forces: thus, the FF curve had a typical exponential shape. Conclusions: The iEMG filling method can be considered of general applicability since the FF increased over a wide range in all healthy participants. Significance: The EMG filling analysis may have potential to detect scenarios of MU loss and remodelling in neurogenic and motor neuron diseases. | en |
| dc.description.sponsorship | This work has been supported by the Spanish Ministry of Science and Innovation under the project PID2022-136620OB-I00 | |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Mariscal, C., Navallas, J., Malanda, A., Recalde-Villamayor, S., Rodriguez-Falces, J. (2025). EMG filling analysis, a new method for the assessment of recruitment of motor units with needle EMG. Neurophysiologie Clinique, 55(4), 1-8. https://doi.org/10.1016/j.neucli.2025.103059. | |
| dc.identifier.doi | 10.1016/j.neucli.2025.103059 | |
| dc.identifier.issn | 0987-7053 | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/54030 | |
| dc.language.iso | eng | |
| dc.publisher | Elsevier | |
| dc.relation.ispartof | Neurophysiologie Clinique (2025), vol. 55, núm. 4, 103059 | |
| dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-136620OB-I00/ | |
| dc.relation.publisherversion | https://doi.org/10.1016/j.neucli.2025.103059 | |
| dc.rights | © 2025 The Authors. This is an open access article under the CC BY license. | |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Intramuscular EMG | en |
| dc.subject | Filling factor | en |
| dc.subject | EMG filling | en |
| dc.subject | Interference pattern | en |
| dc.subject | Concentric needle | en |
| dc.subject | Probability Density Function (PDF) | en |
| dc.title | EMG filling analysis, a new method for the assessment of recruitment of motor units with needle EMG | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | |
| dspace.entity.type | Publication | |
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