Nervous System: Neuron, Synapse, Reflexes · Zoology

What is 'Temporal Summation' at a synapse?

  1. Multiple different neurons stimulating a single postsynaptic cell simultaneously
  2. A single presynaptic neuron firing repeatedly in quick succession
  3. The breakdown of neurotransmitters over time
  4. The movement of a signal from the axon to the dendrites
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Correct answer: A single presynaptic neuron firing repeatedly in quick succession

Temporal summation occurs when a single presynaptic neuron generates multiple EPSPs so rapidly that they add together before the previous one has decayed, eventually reaching the threshold.

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