Potentiation of force by extracellular potassium and posttetanic potentiation are additive in mouse fast-twitch muscle in vitro

The influence of moderately elevated extracellular potassium concentration ([K + ]) on muscle force has marked similarities to that of posttetanic potentiation (PTP) in that twitch force may be enhanced whilst high-frequency force is depressed. The purpose of this work was to test whether K + -induc...

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