Figure 5

summarizes the effects of a single amphetamine (0.6 mg/kg, i.p.) injection in animals treated chronically with MDMA or saline (see Table 1) for the HA, TD, VA, and NOS locomotor indices on experimental days 14 and 39, comparing activity counts of each MDMA treatment group to the saline group on the same experimental day. The values are presented as the mean ± S.E.M. *p < 0.05.