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.

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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

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