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Group Mean (±SEM) start latencies (top panel), run times (middle panel), and approach-avoidance retreat behavior (bottom panel) of animals running a straight alley once daily for an infusion of 1 mg/kg i.v. cocaine after pretreatment with either 0.1 (dotted lines) or 0.25 μg (dashed lines) CP 94,253, or vehicle (solid lines) into the LHb.
