Fig. 5.

Data from self-administration sessions (Sessions 1-5) and extinction sessions with all cocaine-associated cues withheld (Sessions 6-10) in female (upper panel) and male (lower panel) rats. Left axes depict number of infusions obtained (Sessions 1-5); right axes depict number of lever presses (Sessions 6-10). Horizontal axes indicate session number. Vertical reference line indicates transition between cocaine self-administration and extinction testing. Asterisks (*) indicate significant differences from exercising rats.