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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Neurobiol Learn Mem. 2009 Jul 24;92(4):581–589. doi: 10.1016/j.nlm.2009.07.007

Figure 3.

Figure 3

Conditioned freezing in rats receiving intra-thalamic infusions of glutamate receptor antagonists prior to an abbreviated extinction session (Experiment 1b). (A) Mean percentage of freezing (±SEM) during training that consisted of a pretrial period (Pre) followed by 5 tone-shock presentations. Freezing was measured during the pretrial period and the 1 min intertrial interval. (B) Mean percentage of freezing (±SEM) during the 45 tone-alone extinction session (data are displayed in 15 bins consisting of 3 trials averaged together). Freezing was measured during the pretrial period and the 30 sec intertrial intervals. (C) Mean percentage of freezing (±SEM) during the first 15 minutes of the 45 tone-alone tone test (data are displayed in 5 bins of 3 trials averaged together). Data is shown for rats that were extinguished under NBQX (open squares), MK-801 (open circles), NBQX and MK-801 (open triangles) or vehicle (filled squares). Data for animals that were not extinguished under vehicle are also shown (filled circles).