is the depolarisation of a postsynaptic membrane in response to a synaptic input which increases the probability that a cell will fire an action potential

Potential that is generated in a postsynaptic neuron by activation of an excitatory synapse, usually depolarizing

An electrical change (depolarisation) in the membrane of a postsynaptic neurone caused by the binding of an excitatory neurotransmitter from a presynaptic cell to a postsynaptic receptor; makes it more likely for a postsynaptic neurone to generate an action potential.

A graded depolarization of the postsynaptic cell.

Local graded depolarization of dendrites or soma of neurone; can be summated in time and space.

In neuroscience, an excitatory postsynaptic potential (EPSP) is a temporary increase in postsynaptic membrane potential caused by the flow of positively charged ions into the postsynaptic cell. They are the opposite of inhibitory postsynaptic potentials (IPSPs), which usually result from the flow of negative ions into the cell. A postsynaptic potential is defined as excitatory if it makes it easier for the neuron to fire an action potential.