Key result
Excitation of frog sartorius muscle with two stimuli yields an increment of isometric heat over a single twitch, representing activation heat which is independent of muscle length.
Population
Frog sartorius muscle
Comparison
Excitation with two stimuli with varying… vs Single twitch
Design
Preclinical
Authors
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No direct clinical implications for human muscle energetics; leaves open translation of activation heat properties to mammalian models.
This basic science study demonstrates that activation heat in frog sartorius muscle is independent of length and temperature but increased by nitrate and caffeine.
Gibbs et al. (1966) studied this question. Excitation with two stimuli vs. Single twitch was evaluated on Activation heat (increment of isometric heat). Excitation of frog sartorius muscle with two stimuli yields an increment of isometric heat over a single twitch, representing activation heat which is independent of muscle length.
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