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 ?
2+] can depolarize the membrane by entering the cell, and the anion [Cl.
Tissues under normal conditions depolarize rapidly in an antegrade manner.
Roth has continued his mathematical work with the bidomain model and predicts in the December 1995 IEEE Transactions on Biomedical Engineering not only that the stimulus from a positive or a negative electrode will cause a wave to spread but that removing either stimulus will depolarize cells.
Prolonging the flash does not further depolarize the cell.
1979; Giles and Usherwood, 1985), has recently been shown to depolarize neurons in the motor nerve net (MNN) of the scyphozoan jellyfish Cyanea capillata (Anderson and Trapido-Rosenthal, 1990).
The eel polarizes and depolarizes thousands of cells instantaneously to put out these high voltages," said study co-author Max Shtein, U-M associate professor of materials science and engineering.
It has been reported that kisspeptin potently depolarizes GnRH neurons primarily through the activation of canonical transient receptor potential channels (TRPC).
This depolarizes a critical mass of the heart muscle, terminates the dysrhythmia and allows normal sinus rhythm to be reestablished by the body's natural pacemaker, in the sinoatrial node of the heart.
An active ingredient, potassium, depolarizes the nerve so you don't feel anything when you eat something hot or cold.
Gaunt challenges Islam's allotment of Marco Polo to the sedentary side, as he demonstrates how the Devisement depolarizes the world by parsing it into a set of differential, Derridean relationships between lateral parts, where strangeness can be allocated both to the traveler and those whom s/he encounters.
The active ingredient electrically depolarizes the microbe's membrane and inactivates them, creating a permanently protected surface.
The magnetic field passes through the scalp and skull, and induces a current in the underlying tissue, which depolarizes neurons.