4 aminobutyric acid A receptor 1 4 aminobutyric acid release Article 1 GABAergic transmission 1 MDMA 1 animal behavior 1 animal experiment 1 brain electrophysiology 1 brain slice 1 central amygdala 1 central nucleus (amygdala) 1 chemical structure 1 controlled study 1 drug self administration 1 dynorphin 1 electrophysiology 1 entactogen 1 female 1 inhibitory synaptic transmission 1 intravenous self-administration 1 kappa opiate receptor 1 methylone 1 nonhuman 1 pentylone 1 postsynaptic inhibition 1 psychostimulant agent 1 rat 1 unclassified drug 1 whole cell patch clamp 1