Neuronal Receptors (s) having During periods of induced regular firing, intrastriatal stimuli were used to evoke pharmacologically isolated monosynaptic AMPA receptor-mediated EPSPs or GABAA receptor-mediated IPSPs. EPSPs evoked during the interspike interval (ISI) produced a phase-dependent decrease in the ISI, whereas IPSPs produced a phase-independent prolongation of the ISI as Publication facts