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dc.contributor.authorKallio, Jouni
dc.contributor.authorSøgaard, Karen
dc.contributor.authorAvela, Janne
dc.contributor.authorKomi, Paavo
dc.contributor.authorSelänne, Harri
dc.contributor.authorLinnamo, Vesa
dc.date.accessioned2016-06-08T07:18:00Z
dc.date.available2016-06-08T07:18:00Z
dc.date.issued2014
dc.identifier.citationKallio, J., Søgaard, K., Avela, J., Komi, P., Selänne, H., & Linnamo, V. (2014). Motor unit discharge rate in dynamic movements of the aging soleus. <i>Frontiers in Human Neuroscience</i>, <i>8</i>(SEP), Article 773. <a href="https://doi.org/10.3389/fnhum.2014.00773" target="_blank">https://doi.org/10.3389/fnhum.2014.00773</a>
dc.identifier.otherCONVID_23919642
dc.identifier.otherTUTKAID_63293
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50163
dc.description.abstractAging is related to a variety of changes at the muscular level. It seems that the age-related changes in motor unit activation are muscle- and intensity dependent. The purpose of this study was to examine the motor unit discharge rate (MUDR) in both isometric and dynamic contractions of the aging soleus muscle. Eight elderly males participated in the study. The subjects performed isometric and dynamic plantar flexions while seated in an ankle dynamometer. The force levels studied were 10, 20, 40, 60, 80 and 100% of the isometric (ISO) maximal voluntary contractions (MVC) in ISO and 10, 20 and 40% in concentric (CON) and eccentric (ECC) contractions. Soleus intramuscular EMG was recorded with bipolar fine-wire electrodes and decomposed to individual trains of motor unit discharges. In ISO the MUDR increased with each force level from 40 to 100% MVC. In dynamic contractions the descriptive analysis showed a higher MUDR in CON compared to ISO or ECC. The difficulties of recording single motor units in dynamic contractions, especially in the elderly is discussed.
dc.languageeng
dc.language.isoeng
dc.publisherFrontiers Research Foundation
dc.relation.ispartofseriesFrontiers in Human Neuroscience
dc.subject.otheraging
dc.subject.otherdynamic contraction
dc.subject.othersoleus
dc.subject.otherintramuscular electromyography
dc.subject.othermotor unit
dc.titleMotor unit discharge rate in dynamic movements of the aging soleus
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201606062900
dc.contributor.laitosLiikuntabiologian laitosfi
dc.contributor.laitosDepartment of Biology of Physical Activityen
dc.contributor.oppiaineBiomekaniikkafi
dc.contributor.oppiaineBiomechanicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-06-06T11:08:33Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn1662-5161
dc.relation.numberinseriesSEP
dc.relation.volume8
dc.type.versionpublishedVersion
dc.rights.copyright© 2014 Kallio, Søgaard, Avela, Komi, Selänne and Linnamo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).
dc.rights.accesslevelopenAccessfi
dc.rights.urlhttp://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.3389/fnhum.2014.00773


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© 2014 Kallio, Søgaard, Avela, Komi, Selänne and Linnamo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).
Except where otherwise noted, this item's license is described as © 2014 Kallio, Søgaard, Avela, Komi, Selänne and Linnamo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).