prepotential

A gradual rise in potential between action potentials as a phasic swing in electric activity of the cell membrane, which establishes its rate of automatic activity, as in the ureter or cardiac pacemaker.

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pre·po·ten·tial -pə-'ten-chəl n a slow depolarization of a plasma membrane that precedes the action potential <fast \prepotentials were seen and appear similar to those recorded in hippocampal pyramidal cells (Science)> compare afterpotential

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pre·po·ten·tial (pre″po-tenґshəl) the slow diastolic depolarization of the cell membranes of the cardiac pacemaker.

Medical dictionary. 2011.

Look at other dictionaries:

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