Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1978 Jan 31;373(1):21-4.
doi: 10.1007/BF00581144.

Series elastic properties of skinned muscle fibres in contraction and rigor

T Yamamoto, J W Herzig

Series elastic properties of skinned muscle fibres in contraction and rigor

T Yamamoto et al. Pflugers Arch. .

Abstract

Isometric tension of skinned fibres from the frog semitendinosus muscle is sigmoidally related to Ca2+ concentration between pCa 7 and 6. Stiffness measurements showed that the Ca2+-activated tension may be due to recruitment of attached cross-bridges. In the absence of ATP (rigor solution) the skinned fibre develops a rigor tension which reaches about 80-110% of the maximum Ca2+-activated tension. However, stiffness measurements showed that in rigor many more cross-bridges are attached to actin at any one moment than in contraction. It was concluded that the force per cross-bridge is 37% smaller in rigor than in contraction.

PubMed Disclaimer

References

    1. J Physiol. 1974 Mar;237(2):243-58 - PubMed
    1. Nature. 1971 Oct 22;233(5321):533-8 - PubMed
    1. J Physiol. 1970 Nov;211(1):19-35 - PubMed
    1. J Physiol. 1969 Feb;200(3):807-19 - PubMed

LinkOut - more resources