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Related Experiment Video

Updated: Jul 17, 2026

Real Time and Repeated Measurement of Skeletal Muscle Growth in Individual Live Zebrafish Subjected to Altered Electrical Activity
11:41

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Published on: June 16, 2022

MUSCLE VOLUME CHANGES: RELATION TO THE ACTIVE STATE.

R J BASKIN, P J PAOLINI

    Science (New York, N.Y.)
    |May 14, 1965
    PubMed
    Summary

    Frog sartorius muscle volume changes during contraction, correlating with muscle activity. Temperature and initial length influence these volume changes, suggesting a link to the muscle

    Area of Science:

    • Muscle physiology
    • Biophysics

    Background:

    • Muscle contraction involves complex mechanical and biochemical processes.
    • Understanding volume changes during muscle activity provides insights into these mechanisms.

    Purpose of the Study:

    • To investigate the relationship between volume changes and the active state of frog sartorius muscle.
    • To explore how temperature and initial muscle length affect these volume dynamics.

    Main Methods:

    • Measurements of frog sartorius muscle volume changes during isometric twitches.
    • Varying experimental conditions such as temperature and initial muscle length.
    • Treatment with iodide Ringer solution to alter the muscle's active state.

    Main Results:

    Keywords:
    ELECTROPHYSIOLOGYEXPERIMENTAL LAB STUDYFROGSMUSCLE CONTRACTIONPHYSIOLOGY

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  • Muscle volume increases during a twitch, followed by a decrease, with a magnitude of 10(-5) cm(3)/g.
  • Time courses of volume change and tension onset are temperature-dependent.
  • Greatest volume decrease observed during isometric twitches at reference length.
  • Iodide Ringer solution prolonged both the active state and volume changes.

    • Conclusions:

    • Volume changes in frog sartorius muscle are correlated with its active state and contraction mechanism.
    • Temperature and initial muscle length are critical factors modulating these volume dynamics.