 Afterhyperpolarization

Afterhyperpolarization (AHP) is a phase that occurs in the action potential of a neuron following the depolarization phase and repolarization. During AHP, the membrane potential becomes more negative than the resting membrane potential, making the neuron less excitable for a brief period. This phenomenon is primarily due to the slow closure of potassium (K⁺) channels that open in response to the cell’s depolarization.