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At the end of repolarization, the nerve ...

At the end of repolarization, the nerve membrane gets hyperpplarized. Why ?

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If repolarization becomes more negative than the resting potential -70 mV to about -90 mV, it is called Hyperpolarization. During this, `K^+` ion gates are more permeable to `K^+` even after reaching the threshold level as it closes slowly, hence called Lazy gates. The membrane potential returns to its original resting state when `K^+` ion channels close completely. During hyperpolarization the `Na^+` voltage gate remains closed.
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