afterpotential
Also found in: Medical.
afterpotential
[′af·tərpə¦ten·chəl] (neuroscience)
A small positive or negative wave that follows and is dependent on the main spike potential, seen in the oscillograph tracing of an action potential passing along a nerve.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.