When chemically-regulated sodium
channels are open and sodium is diffusing into the cell a postsynaptic neuron
will have an Excitatory Postsynaptic Potential (EPSP). And if a neurotransmitter binds to a receptor with a reversal potential
that is higher than the threshold potential for the postsynaptic
neuron, the postsynaptic cell will be more likely to generate
an action potential and an excitatory postsynaptic potential will
occur (EPSP).
