Figure 1.

Behavioral task and recording sites. A, Dynamic foraging task. Rats were tested on a modified T maze to choose between two locations (blue circles) that delivered water reward with different probabilities. The maze was divided spatially into four different stages (stem, approach, goal, and return) as indicated by the dotted lines (blue dotted line, beginning of a trial). Arrows indicate alternative movement directions of the animals. B, Recording sites. The photomicrographs are coronal sections of the brain that were stained with cresyl violet. Single units were recorded from the dorsal CA1 (left) and dorsal subiculum (right). The arrows indicate marking lesions. Scale bars: A, 10 cm; B, 1 mm.