Passive forces in mammalian skeletal muscle: a freely-jointed and worm-like chain.

Abstract:

:The passive mechanical properties of whole muscle in active and nonactive states are compared. The experimental results are presented as stress-strain curves, which are analyzed in the framework of the current theoretical background [viz. the freely-jointed chain model (FJCM) and the worm-like chain model (WLCM)] in a semi-quantitative fashion. This analysis shows that both models can explain the mechanical behavior of whole muscle in non-active state. In the active state, the presence of crossbridges alters the mechanical response, leading to a markedly different behavior, as expected. A discussion of the mechanisms involved and the interpretation of the parameters required for the fitting of the stress-strain curves is also presented.

journal_name

Gen Physiol Biophys

authors

Muñiz J,Marín JL,Huerta M,Del Rio J,Larios A,Trujillo X

subject

Has Abstract

pub_date

1999-06-01 00:00:00

pages

155-63

issue

2

eissn

0231-5882

issn

1338-4325

journal_volume

18

pub_type

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