repolarization


repolarization
The process whereby the membrane, cell, or fiber, after depolarization, is polarized again, with positive charges on the outer and negative charges on the inner surface.

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re·po·lar·iza·tion also Brit re·po·lar·isa·tion .rē-pō-lə-rə-'zā-shən n restoration of the difference in charge between the inside and outside of the plasma membrane of a muscle fiber or cell following depolarization
re·po·lar·ize also Brit re·po·lar·ise (')rē-'pō-lə-.rīz vb, -ized also Brit -ised; -iz·ing also Brit -is·ing

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n.
the process in which the membrane of a nerve cell returns to its normal electrically charged state after a nerve impulse has passed. During the passage of a nerve impulse a temporary change in the molecular structure of the membrane allows a surge of ions across the membrane (see action potential). During repolarization ions diffuse back to restore the charge and the nerve becomes ready to transmit further impulses. See refractory period.

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re·po·lar·iza·tion (re-po″lər-ĭ-zaґshən) the reestablishment of polarity, especially the return of cell membrane potential to resting potential after depolarization. See also potassium channel and sodium channel, under channel.

Medical dictionary. 2011.

Look at other dictionaries:

  • Repolarization — In neuroscience, repolarization refers to the change in membrane potential that returns the membrane potential to a negative value after the depolarization phase of an action potential has just previously changed the membrane potential to a… …   Wikipedia

  • repolarization — n. the process in which the membrane of a nerve cell returns to its normal electrically charged state after a nerve impulse has passed. During the passage of a nerve impulse a temporary change in the molecular structure of the membrane allows a… …   The new mediacal dictionary

  • repolarization — noun Date: 1922 restoration of the difference in charge between the inside and outside of the cell membrane following depolarization • repolarize verb …   New Collegiate Dictionary

  • repolarization — n. * * * …   Universalium

  • repolarization — noun The act of repolarizing …   Wiktionary

  • repolarization — re·polarization …   English syllables

  • repolarization — re po•lar•i•za′tion n …   From formal English to slang

  • repolarization — …   Useful english dictionary

  • early repolarization — a normal variant of the usually isoelectric ST segment in which the segment is elevated at its J point; it is seen mostly in children, young adults, and black men. Early repolarization. The benign ST segment elevations are usually most marked in… …   Medical dictionary

  • Реполяризация (Repolarization) — фаза, во время которой восстанавливается исходный по тенциал покоя мембраны нервной клетки после прохождения через нее нервного импульса. Во время прохождения нервного импульса происходит временное изменение молекулярной структуры мембраны, в… …   Медицинские термины