See excitatory post-synaptic potential.
<abbreviation> Excitatory postsynaptic potential. ... (05 Mar 2000) ... 
Environmental Protection and Safety Panel
Type: Abbreviation Definitions: 1. Abbreviation for excitatory postsynaptic potential.
Excitatory postsynaptic potential; a graded depolarization of a postsynaptic membrane in response to stimulation by a neurotransmitter chemical. EPSPs can be summated but can be transmitted only over short distances. They can stimulate the production of action potentials when a threshold level of depolarization has been attained.