Population
Isolated twitch and slow muscle fibres dissected from the iliofibularis muscle of Xenopus laevis
Comparison
Electrical stimulation or high K concentration… vs Comparison between twitch and slow fibres
Design
Preclinical
Authors
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Muscle fiber kinetics in this amphibian model warrant no change in cardiovascular practice; leaves open cross-bridge differences in mammalian myocardium.
This preclinical study demonstrates that twitch muscle fibres in Xenopus laevis have a maximum shortening velocity 6 times higher and a cross-bridge turnover rate 15 times higher than slow muscle fibres.
Jan Lännergren (1978) studied this question.
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