Repolarization Vector

Repolarization vector

The repolarization vector is an electromechanical phenomenon in excitable tissues (including nerve endings and muscle fibers), providing both involuntary contraction of muscles and organs and automatic maintenance of “innate” muscle tone adequate to the regulatory afferent impulses. The generational (presynaptic) polarization oscillation that occurs during excitation reaches a peak at the moment when the membrane becomes hyperpolarized to a value equal to the threshold for fast current. At this moment, depolarization enters the repolarization stage. With a slow (electrodynamic) potential, such a point is located in the axon before the postsynaptic potential (PSSP) or in the intersynaptic cleft. If the depolarization hyperpolarization is above the repolarization threshold, then the ionic current is insufficient to reverse the resting potential to zero. In this case, repolarization is suppressed. As the threshold potential weakens and decreases, repolarization develops and spreads to the entire action potential.

If the impulse moves towards the nerve cell towards the downward wave of excitation (usually synaptic effects are prevented