Excitatory postsynaptic potential
= Excitatory postsynaptic potential
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= EPSP
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{synonym}
An <excitatory postsynaptic potential> is a <synaptic potential> associated with increased likelihood of a postsynaptic <action potential>. Its size and effect depend on the receiving <neuron>'s state; the definition concerns firing, not a fixed <neurotransmitter> identity. See <synaptic potential> for the mechanism and source.