Figure 4From: Roles of the anterior cingulate cortex and medial thalamus in short-term and long-term aversive information processing Effects of microinfusion of lidocaine into the MT on the initial and retention latencies tested in the inhibitory avoidance task. a. Illustration of infusion cannula placements (arrow) in a histological section of the medial thalamus. Placements shown are from all rats included in the final analysis (MT-pretest-lidocaine, filled inverted triangles; MT-posttraining-lidocaine, open squares). b. Lidocaine infusion into the MT immediate after behavioral training disrupted retention of inhibitory avoidance learning conducted 24 h later. Fisher's LSD test showed a significant difference between posttraining infusions of saline and lidocaine in the MT group in the 24 h retention test (**p < 0.01). c. Lidocaine infusion into the MT immediately before the 24 h retention test had no effect on the retention of inhibitory avoidance learning tested 24 h later.Back to article page