the behavioral effect of single administration of +/- 3,4-methylene-dioxymethamphetamine ( mdma ) on rats performing on the differential-reinforcement-of-low-rate 72-second schedule ( drl 72-sec ) was compared before and after a period of repeated administration of mdma known to deplete 5-hydroxytryptamine ( 5-ht ) levels in the brain .
C0004927
behavioral
C0006104
brain