positively regulates positive regulation of signal transduction regulation of biological process excitatory postsynaptic potential modulation of excitatory postsynaptic potential positive regulation of excitatory postsynaptic potential Any process that enhances the establishment or increases the extent of the excitatory postsynaptic potential (EPSP) which is a temporary increase in postsynaptic potential due to the flow of positively charged ions into the postsynaptic cell. The flow of ions that causes an EPSP is an excitatory postsynaptic current (EPSC) and makes it easier for the neuron to fire an action potential. 2011-03-04T02:43:32Z positive regulation of EPSP GO:2000463 positive regulation of excitatory post-synaptic membrane potential