all-or-none law definition | Psychology Dictionary

all-or-none law

the principle that the amplitude of the action potential in a neuron is independent of the magnitude of the stimulus. Thus, all stimuli above the neuron’s threshold trigger action potentials of identical magnitude (although they may vary in frequency); stimuli below this threshold may produce local graded potentials but no propagated impulses. Also called all-or-none principle.

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all-or-none law

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least perceptible duration

least perceptible duration