Fig. 2.

A, left: schematic of the spiral track platform in the vertical position. Right: the vertical platform along with the floor box and ramp used for experiment 2. B: protocol for the 7 consecutive recording sessions. See text for details. Black bar represents the position of the vertical platform within the recording room along with the floor box (light gray) and attached ramp (dark gray)(experiment 2). The positions of the vertical platform for experiment 1 were similar to those for experiment 2 but did not contain the floor box. Note: the start location for the first vertical wall session (session 4) was randomized between North, South, East, and West, and the sequence for the following Vertical sessions (sessions 5–7) was also randomized in terms of proceeding in a clockwise or counterclockwise direction.