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. 2022 Feb 18;239(3):935–949. doi: 10.1007/s00213-022-06086-9

Fig. 2.

Fig. 2.

Effects of MDMA on behavioral sensitization. Mice were trained for 7 days and locomotion (ac), stereotypy (df), and verticality (gi) on the drug-paired side were measured. a, d, g Time course of activity on day 1 (left) and day 7 (right) of training. There were no group differences on day 1, but on day 7, mice receiving 10 mg/kg MDMA exhibited increased locomotion (a), stereotypy (d), and verticality (g) relative to saline controls. b, e, h Average activity on each of the seven days of training. Mice receiving 10 mg/kg MDMA exhibited increased locomotion (b), stereotypy (e), and verticality (h) relative to saline controls from day 3 to day 7. c, f, i Development of sensitization as measured by the difference in average activity on day 7 versus day 1. Mice receiving 10 mg/kg MDMA exhibited a greater increase in locomotion (c), stereotypy (f), and verticality (i) from day 1 to day 7 relative to saline controls. Asterisks identify significant comparisons against the saline control group at the same time point