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May 1, 1972The Journal of General PhysiologyOpen Access

Mechanical Properties of the Sarcolemma and Myoplasm in Frog Muscle as a Function of Sarcomere Length

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Population

Single muscle fiber of the frog semitendinosus

Design

Preclinical

Authors

SRStanley I. RapoportLinköping University

Discussion

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Implication

Animal data show length-dependent sarcolemmal tension contribution; leaves open relevance to human cardiac or skeletal muscle mechanics.

Structured PICO

P
Population
Single muscle fiber of the frog semitendinosus
I
Intervention
Application of the elastimeter method (sucking a bleb into a flat-mouthed pipette)
O
Outcome
Elastic moduli of the sarcolemma and myoplasm, and their relative contributions to resting fiber tension at different extensionssurrogate

The study demonstrates that the sarcolemma contributes to resting muscle fiber tension only at extended sarcomere lengths (>3 micro), with myoplasmic elasticity providing resistance to deformation at shorter lengths.

Cite This Study

Stanley I. Rapoport (1972) studied this question.

synapsesocial.com/papers/6a927327c90bc2b8b446552dhttps://doi.org/10.1085/jgp.59.5.559
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Also Consider

Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Variations of the Contractile Apparatus in Smooth and Striated Muscles1967 · 47 citations
  2. 2Tension development in highly stretched vertebrate muscle fibres1966 · 349 citations