Fig. 7.

Lack of cocaine-induced place preference in mice injected with SL 327. A, Time spent in drug-associated compartment during the preconditioning (white bars) and the testing phase (hatched bars). Values represent mean ± SEM from n = 8 independent mice per group. B, Scores calculated as the difference between postconditioning and preconditioning time spent in the compartment associated with cocaine. ★★ p < 0.001 when comparing with saline group. ⋆⋆ p < 0.001 when comparing with cocaine group (Newman–Keuls test).