in the cn neurons of which spikes elicited by stimulation of the pars compacta of substantia nigra ( sn ) were suppressed by iontophoretically applied domperidone , a dopamine d-2 receptor antagonist , application of opc-4392 ( 100-200 na ) inhibited the spike generation induced by sn stimulation .
C0175412
pars compacta
C0038590
sn