Depolarization


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depolarization

[dē‚pō·lə·rə′zā·shən]
(electricity)
The removal or prevention of polarization in a substance (for example, through the use of a depolarizer in an electric cell) or of polarization arising from the field due to the charges induced on the surface of a dielectric when an external field is applied.
(optics)
The resolution of polarized light in an optical depolarizer.

Depolarization

 

the decrease in the difference in potentials during the resting state (so-called resting potential) between the internal and external sides of the membrane of a living cell. In nerve cells and their processes, as well as in muscle fibers, depolarization is one of the most important components of the process of excitation. Stable depolarization may occur experimentally or in certain diseases as a result of direct damage to the membrane or disruption of metabolism.

References in periodicals archive ?
Besides, the inhibition of the mitochondrial respiratory chain described above by decavanadate can lead to sustained mitochondrial depolarization which is lethal for cells demanding a high supply of metabolic energy.
The first test case regards the pulse propagation inside a dispersive medium described by the Maxwell-Garnet model, the linear filling factor function, and the depolarization factor [N.
This is the thermally stimulated depolarization step of a TSDC experiment, in which the sample returns to the equilibrium state.
discovered that depolarization of cerebellar Purkinje cells induces transient suppression of inhibitory inputs to the depolarized cells.
The fast sodium channels are responsible for the rapid depolarization (phase 0) of fast-response cardiac action potentials.
The mean electrical axis (MEA) of ventricular depolarization was calculated in the frontal plane by the vector method with leads II and III.
THE QUANTUM STOKES OPERATORS AND THE DEGREE OF DEPOLARIZATION
The depolarization curve is a part of the hysteresis loop between the points (0, [D.
The potentials shown in each of the figures include the native potential (Ecorr), the on- and off-potentials, the "decayed-off" potential (potential measured during depolarization), and the "rest potential" (potential when depolarization becomes steady), or the polarization growth or decay and the IR drop.