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Effect of pre-exposure to chocolate (1 ml) 24 hr before on DA transmission in the NAc shell (Ringer's solution with 1.2 mm CaCl2). Basal value: NAc shell, 33 ± 3 (means ± SEM in femtomoles per sample). Scores of ingestive reactions are also indicated. Results are means ± SEM of the results obtained in at least four rats. ▪p < 0.05 with respect to basal values; *p < 0.05 with respect to naive group.
