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Context-evoked activity in the piriform cortex. (A) Zif268-positive cell density in the piriform cortex was increased in response to odorant stimulation (Lim-Lim) and in response to context (Lim-NO) compared to control animals (“NO-NO” group). (B) Same as A, with decanal used instead of limonene (*p < 0.05, **p < 0.005).
