negative regulation of mini excitatory postsynaptic potential

Any process that decreases the frequency, rate or extent of mini excitatory postsynaptic potential. Mini excitatory postsynaptic potential is a process that leads to a temporary increase in postsynaptic potential due to the flow of positively charged ions into the postsynaptic cell, induced by the spontaneous release of a single vesicle of an excitatory neurotransmitter into the synapse.

Definition from the Gene Ontology (GO:0061886), read 2026-09-23. CC BY 4.0.