Reconstruction of the human gastrocnemius force-length curve in vivo: part 1 -- model-based validation of method.
The muscle fiber force-length relationship has been explained in terms of the cross-bridge theory at the sarcomere level. In vivo, for a physiologically realistic range of joint motion, and therefore range of muscle fiber lengths, only part of the force-length curve may be used; that is, the section...
| Publicado en: | Journal of Applied Biomechanics Vol. 24; no. 3; pp. 197 - 207 |
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| Autores principales: | , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Human Kinetics Publishers, Inc.
Aug2008
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| 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=105700108&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105700108 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10658483 0DM jtl: Journal of Applied Biomechanics issn: 10658483 maglogo: N pubinfo: dt: Aug2008 vid: 24 iid: 3 pid: 553 pub: Human Kinetics Publishers, Inc. place: Champaign, Illinois artinfo: ui: 105700108 105700108 2010021243 10.1123/jab.24.3.197 NLM18843149 105700108 ppf: 197 ppct: 10 formats: tig: atl: Reconstruction of the human gastrocnemius force-length curve in vivo: part 1 -- model-based validation of method. aug: au: Winter SL Challis JH affil: Department of Sport and Exercise Science, Aberystwyth University, UK sug: subj: Gastrocnemius Muscle Anatomy and Histology Gastrocnemius Muscle Physiology Models, Anatomic Models, Statistical Muscle Strength Physiology Comparative Studies Descriptive Statistics Exercise Physiology Mathematics Models, Theoretical Muscle Contraction Muscle Fibers Physiology Pilot Studies Range of Motion Regression Tendons Physiology Human ab: The muscle fiber force-length relationship has been explained in terms of the cross-bridge theory at the sarcomere level. In vivo, for a physiologically realistic range of joint motion, and therefore range of muscle fiber lengths, only part of the force-length curve may be used; that is, the section of the force-length curve expressed can vary. The purpose of this study was to assess the accuracy of a method for determining the expressed section of the force-length curve for biarticular muscles. A muscle model was used to simulate the triceps surae muscle group. Three model formulations were used so that the gastrocnemius operated over different portions of the force-length curve: the ascending limb, the plateau region, and the descending limb. Joint moment data were generated for a range of joint configurations and from this simulated data the region of the force-length relationship that the gastrocnemius muscle operated over was successfully reconstructed using the algorithm of Herzog and ter Keurs (1988a). Further simulations showed that the correct region of the force-length curve was accurately reconstructed even in the presence of random and systematic noise generated to reflect the effects of sampling errors, and incomplete muscle activation. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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