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Pre-extinction DCS reduces contextual freezing following strong conditioning. MK-801 and DCS were injected 30 min prior to the extinction session. MK-801 acutely reduced contextual freezing during the first 2 bins of the extinction session (A). DCS, but not MK-801, reduced contextual freezing at the subsequent test (B). N = 8 per group. *p < 0.05.
