THE NATURE OF THE ACTION POTENTIALS IN THE FROG'S GASTROCNEMIUS MUSCLE

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Abstract
By recording the potentials produced by the muscle from a conducting field of known form surrounding it, it was found that the potential change in the muscle corresponds with that of 2 dipoles or associated groups of pos. and neg. charges, both oriented along the long axis of the muscle but of opposite polarity, asynchronous in development and of different magnitude and duration. The amt. of electricity produced during the period of the 2d dipole is at least 6 times that produced during the period of the 1st dipole. It is suggested that sources of electricity are present other than those arising from membrane depolarization and repolarization.