Fig. 2.

Abrupt and coherent expression of square- or circle- representation during probe trials in intermediate octagonal environments in Rat 4. The 17 of 20 place cells simultaneously recorded from rat 4 with different (remapped) firing patterns in the square and the circle almost all switch from the square-like to circle-like pattern between the 2:6 and 3:5 octagons. 8 cells had fields in the circle but not the square (cells 1-8); 4 in the square but not the circle (9-12); 5 fired in both but in different places (13-17), and 3 did not did not reach our criterion for remapping (18-20) (18).