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Temporal summation occurs when a high frequency of action potentials in the presynaptic neuron elicits postsynaptic potentials that summate with each other. The duration of a postsynaptic potential is longer than the interval between incoming action potentials.
Temporal summation is the addition of quickly occurring stimuli at a single synapse that is active repeatedly. A common EPSP lasts about 20 ms. Even so, with maximum stimulation, action potentials can reach axon terminals every millisecond.
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What is temporal summation?
How does temporal summation affect action potential initiation?
What is temporal integration?
Is temporal summation possible if presynaptic action potentials are close to each other?
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The more closely postsynaptic potentials are spaced in time, the larger the eventual sum when they are added together. This concept is called temporal summation. Many small EPSPs all arriving at a decision point at the same time will be likely to result in a superthreshold stimulus.
Oct 31, 2023 · Temporal summation means that the effects of impulses received at the same place can add up if the impulses are received in close temporal succession. Thus, the neuron may fire when multiple impulses are received, even if each impulse on its own would not be sufficient to cause firing.
Temporal integration or temporal summation refers to the well-known decrease in detection and discrimination thresholds with increases in the duration of the signal. Most models of this phenomenon (e.g. Plomp and Bouman,1959; Zwislocki, 1960) incorporate “leaky” integration with relatively long time constants, typically hundreds of milliseconds.
Apr 25, 2024 · Temporal summation occurs when the neurotransmitter is released several times by a single pre-synaptic neuron over a period. The repeated release leads to the accumulation of neurotransmitters in the synaptic cleft, surpassing the threshold for generating an action potential.
