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The CFC “null point” is not a result of late drug administration. Animals were subjected to contextual fear conditioning. Two days later, they received i.p. MK-801, or Saline, 30 min prior a reexposure session of 10 min. Memory was assessed on the following day in a test session. MK-801 had no significant effect. Data presented as mean + SEM. n = 8 per group.
