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Percentage of the dopamine contents of the s.n. of the injured side compared to the undamaged, control side of (A) standard and (B) enriched rats. Values are given in percentage, as mean ± S.E.M. One-way ANOVA followed by Tukey’s multiple comparisons test was used for the statistical analysis. * p < 0.05 versus 0.9% NaCl-treated animals of the same group. 6-OHDA: 6-hydroxidopamine and PACAP: pituitary adenylate cyclase-activating polypeptide.
