Figure 2.

A, Overhead view of the landmark rotation and dark test sessions. Each session, except the dark test, was separated by a period of disorientation treatment. The floor paper was replaced, and the walls were washed to remove lingering olfactory cues. White noise was played from an overhead location during each session to remove potential auditory cues. B, Overhead view of the dual-chamber test sessions. The door to the rectangle was closed during the rectangle session once the rat moved into the rectangle. The door to the cylinder was closed during both cylinder 1 and cylinder 2 sessions.