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Effects of repeated treatment (cocaine, n=14 or saline, n=17) on horizontal crossovers (A) and rearing behavior (B), as assessed by comparisons between measurements made on Day 1 and Day 7. Values are presented as mean ± standard error of measurement (SEM). * p < 0.05 and ** p < 0.005 difference between Day 1 and Day 7 (paired t-tests).
