repolarization
Sign in to saveAlso known as repolarisation
thumb|A labeled diagram of an action potential. As seen above, repolarization takes place just after the peak of the action potential, when K+ ions rush out of the cell. In neuroscience, repolarization refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential which has changed the membrane potential to a positive value. The repolarization phase usually returns the membrane potential back to the resting membrane potential. The efflux of potassium (K+) ions results in the falling phase of an action potential. The ion
~12 min read
Article
9 sectionsContents
- Deviations from normal repolarization
- Voltage gated K<sup>+</sup> mechanisms
- Type of K<sup>+</sup> channels in repolarization
- Repolarization of atria cells
- Ventricular repolarization
- Early repolarization syndrome
- Impaired cardiac repolarization with obstructive sleep apnea
- References
- External links
thumb|A labeled diagram of an action potential. As seen above, repolarization takes place just after the peak of the action potential, when K+ ions rush out of the cell. In neuroscience, repolarization refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential which has changed the membrane potential to a positive value. The repolarization phase usually returns the membrane potential back to the resting membrane potential. The efflux of potassium (K+) ions results in the falling phase of an action potential. The ions pass through the selectivity filter of the K+ channel pore.
Repolarization typically results from the movement of positively charged K+ ions out of the cell. The repolarization phase of an action potential initially results in hyperpolarization, attainment of a membrane potential, termed the afterhyperpolarization, that is more negative than the resting potential. Repolarization usually takes several milliseconds.