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Titolo:
Estimation of intrinsic and reflex contributions to muscle dynamics: A modeling study
Autore:
Perreault, EJ; Crago, PE; Kirsch, RF;
Indirizzi:
Case Western Reserve Univ, Dept Biomed Engn, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA Louis Stokes VA Med Ctr, Cleveland, OH 44106 USA Louis Stokes VA Med Ctr Cleveland OH USA 44106 r, Cleveland, OH 44106 USA
Titolo Testata:
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
fascicolo: 11, volume: 47, anno: 2000,
pagine: 1413 - 1421
SICI:
0018-9294(200011)47:11<1413:EOIARC>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN ELBOW JOINT; SHORT-LATENCY REFLEXES; STRETCH REFLEX; NONLINEAR IDENTIFICATION; VOLUNTARY MOVEMENT; ANKLE JOINT; STIFFNESS; DEPENDENCE; SYSTEMS; CAT;
Keywords:
muscle; simulation; stiffness; stretch reflex; system identification;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Perreault, EJ Northwestern Univ, Sch Med, Dept Physiol, Ward 5-295,303 E Chicago Ave, Chicago, IL 60611 USA Northwestern Univ Ward 5-295,303 E Chicago Ave Chicago IL USA 60611
Citazione:
E.J. Perreault et al., "Estimation of intrinsic and reflex contributions to muscle dynamics: A modeling study", IEEE BIOMED, 47(11), 2000, pp. 1413-1421

Abstract

This work evaluated system identification-based approaches for estimating stretch reflex contributions to muscle dynamics. Skeletal muscle resists externally imposed stretches via both intrinsic stiffness properties of the muscle and reflexively mediated changes in muscle activation. To separately estimate these intrinsic and reflex components, system identification approaches must make several assumptions. We examined the impact of making specific structural assumptions about the intrinsic and reflex systems on the system identification accuracy In particular, we compared an approach that made specific parametric assumptions about the reflex and intrinsic subsystems to another that assumed more general nonparametric subsystems, A simulation-based approach was used so that the "true" characters of the intrinsic and reflex systems were known; the identification methods were judged on their abilities to retrieve these known system properties. Identification algorithms were tested on three experimentally based models describing the stretch reflex system, Results indicated that the assumed form of the intrinsicand reflex systems had a significant impact on the stiffness separation accuracy. In general, the algorithm incorporating nonparametric subsystems was more robust than the fully parametric algorithm because it had a more general structure and because it provided a better indication of the appropriateness of the assumed structure.

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Documento generato il 27/01/21 alle ore 03:03:33