Skip to main content

Reconstruction of the human gastrocnemius force-length curve in vivo: part 1-model-based validation of method.

Winter, Samantha L., Challis, John H (2008) Reconstruction of the human gastrocnemius force-length curve in vivo: part 1-model-based validation of method. Journal of Applied Biomechanics, 24 (3). pp. 197-206. ISSN 1065-8483. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)

Abstract

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.

Item Type: Article
Subjects: Q Science > QP Physiology (Living systems)
Divisions: Faculties > Sciences > School of Sport and Exercise Sciences
Depositing User: Samantha Winter
Date Deposited: 30 Nov 2015 17:46 UTC
Last Modified: 29 May 2019 16:33 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52552 (The current URI for this page, for reference purposes)
  • Depositors only (login required):