MK S: MK Shock Alone: Young male C57BL/6J mice received an injection of MK-801 (300 micro-g per g body weight). Animals were placed into the novel context 2 hours prior to receiving the training paradigm that consisted of: Placement into a novel spatial context for 2 min. After 2 min, a 1 sec (0.5 mA) shock was administered through a floor grid. The 2 min-1 sec shock paradigm was repeated for a total of 3 shocks. 1 min after the last shock, animals remained in the training chamber for 1 hour after the last shock. RNA was extracted was extracted 2 hours after the last shock treatment.
