Absolute refractory period

Definition

The absolute refractory period is the time during which a neuron is unable to fire another action potential, regardless of the strength of incoming stimuli. It ensures that each action potential is a separate, all-or-none event and aids in the unidirectional propagation of nerve impulses.

Related terms

Action Potential: A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern.

Neuron: A specialized cell transmitting nerve impulses; a nerve cell.

Depolarization: The process during an action potential when sodium is rushing into the cell causing the interior to become more positive