- muscle action potential
- compound muscle action p.
Medical dictionary. 2011.
muscle action potential
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Compound muscle action potential — The compound muscle action potential (CMAP) or compound motor action potential is a electromyography investigation (electrical study of muscle function). The CMAP represents the sumation of all underlying individual muscle fiber action potentials … Wikipedia
compound muscle action potential — (CMAP) a group of almost simultaneous action potentials from several muscle fibers in the same area; they are usually evoked by stimulation of the supplying motor nerve and are recorded as one multipeaked summated action potential. See also A… … Medical dictionary
Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… … Wikipedia
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
action potential — Physiol. the change in electrical potential that occurs between the inside and outside of a nerve or muscle fiber when it is stimulated, serving to transmit nerve signals. Cf. nerve impulse. [1925 30] * * * Brief (about one thousandth of a… … Universalium
muscle fiber action potential — the action potential recorded on a muscle fiber spreading in both directions away from the plate region to initiate a contraction; see also single fiber electromyography … Medical dictionary
Cardiac action potential — The cardiac action potential is a specialized action potential in the heart, with unique properties necessary for function of the electrical conduction system of the heart.The cardiac action potential differs significantly in different portions… … Wikipedia
compound action potential — see compound muscle action p. and compound nerve action p … Medical dictionary
action potential — An electrical pulse that passes along the membranes of excitable cells, such as neurons, muscle cells, fertilized eggs and certain plant cells. The precise shape of action potentials varies, but action potentials always involve a large… … Dictionary of molecular biology
action potential — noun Date: 1926 a momentary reversal in electrical potential across a plasma membrane (as of a nerve cell or muscle fiber) that occurs when a cell has been activated by a stimulus … New Collegiate Dictionary
