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Median retention scores (with interquartile range) of groups of rats trained in one-trial inhibitory avoidance and injected with either isotonic saline solution (open bars) or 2% lidocaine (filled bars). Training with 2.0 mA protected memory in animals infused with lidocaine into the substantia nigra (SN), but not in those infused into the striatum (STR), or amygdala (AMY). *Denotes p < 0.05 between saline and lidocaine.
