Fig. 2.

Place fields of seven simultaneously recorded hippocampal pyramidal neurons across the entire behavioral sequence from a saline-injected rat (with the rotation session omitted for clarity). Rows are cells and columns are sessions. Color bar shows the cell's firing rate values for the entire set of sessions; unvisited pixels are white. Note that all place fields are stable throughout the experiment, with the exception of those inner box cells that remapped in response to wall removal (e.g., cell 4). Whole-environment correlation scores for the O1–O2 comparison are shown to the Right of the ratemaps.