Modifying motor unit territory placement in the Fuglevand model.
The Fuglevand model is often used to address challenging questions in neurophysiology; however, there are elements of the neuromuscular system unaccounted for in the model. For instance, in some muscles, slow and fast motor units (MUs) tend to reside deep and superficially in the muscle, respectivel...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 55; no. 11; pp. 2015 - 2026 |
|---|---|
| Autores principales: | , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Springer Nature
Nov2017
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=125728368&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 125728368 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Nov2017 vid: 55 iid: 11 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 125728368 125728368 143995157 NLM28390003 125728368 10.1007/s11517-017-1645-7 NLM28390003 125728368 ppf: 2015 ppct: 11 formats: fmt: @attributes: type: P tig: atl: Modifying motor unit territory placement in the Fuglevand model. aug: au: Robertson, Jason Johnston, Jamie Robertson, Jason W Johnston, Jamie A affil: Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada sug: subj: Motor Neurons Physiology Muscle, Skeletal Physiology Computer Simulation Electromyography Methods Muscle Contraction Physiology Algorithms Human ab: The Fuglevand model is often used to address challenging questions in neurophysiology; however, there are elements of the neuromuscular system unaccounted for in the model. For instance, in some muscles, slow and fast motor units (MUs) tend to reside deep and superficially in the muscle, respectively, necessarily altering the development of surface electromyogram (EMG) power during activation. Thus, the objective of this study was to replace the randomized MU territory (MUT) placement algorithm in the Fuglevand model with an optimized method capable of reflecting these observations. To accomplish this, a weighting term was added to a previously developed optimization algorithm to encourage regionalized MUT placement. The weighting term consequently produced significantly different muscle fibre type content in the deep and superficial portions of the muscle. The relation between simulated EMG and muscle force was found to be significantly affected by regionalization. These changes were specifically a function of EMG power, as force was unaffected by regionalization. These findings suggest that parameterizing MUT regionalization will allow the model to produce a larger variety of EMG-force relations, as is observed physiologically, and could potentially simulate the loss of specific MU types as observed in ageing and clinical populations. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|