- positive because it was first detected outside the cell, where the polarity is reversed.
Medical dictionary. 2011.
Look at other dictionaries:
afterpotential — The small change in electrical potential in a stimulated nerve that follows the main, or spike, potential; it consists of an initial negative deflection followed by a positive deflection in the oscillograph … Medical dictionary
afterpotential — noun A small, transitory electrical potential that follows, and is dependent upon the main potential produced when a nerve is stimulated; seen as a small positive or negative spike on an oscillograph output … Wiktionary
positive after-potential — see under afterpotential … Medical dictionary
afterpotential — ˈ ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ noun Etymology: after (IV) + potential : the sequence of electrical events that follows the spike potential of nerve activity and that usually takes the form of a negative followed by a positive potential with both being of … Useful english dictionary
potential — 1. Capable of doing or being, although not yet doing or being; possible, but not actual. 2. A state of tension in an electric source enabling it to do work under suitable conditions; in relation to electricity, p. is analogous to the temperature… … Medical dictionary
action potential — n a momentary reversal in the potential difference across a plasma membrane (as of a nerve cell or muscle fiber) that occurs when a cell has been activated by a stimulus called also spike potential compare RESTING POTENTIAL see afterpotential … Medical dictionary