Both excitatory and inhibitory postsynaptic potentials undergo summation.

Question

Quizplus · Accepted Answer

Both types of postsynaptic potentials, excitatory and inhibitory, can summate to produce a net effect on the postsynaptic neuron. Excitatory postsynaptic potentials (EPSPs) are depolarizations that increase the likelihood of the neuron firing an action potential, while inhibitory postsynaptic potentials (IPSPs) are hyperpolarizations that decrease the likelihood of firing an action potential. The overall effect on the postsynaptic neuron depends on the balance and timing of EPSPs and IPSPs.

Both Excitatory and Inhibitory Postsynaptic Potentials Undergo Summation