Figure 7.

Examples of place fields inside the chambers recorded in the paradigm-naive session, paradigm-familiar sessions and illuminated sessions. Place fields of six place cells are shown, that were recorded during three different conditions (paradigm-naive, paradigm-familiar, illuminated). The bar charts on the right represent each cell’s correlation pattern corresponding to Table 1 based on the mean value of each group of correlations. (A) Paradigm-naïve session: two representative examples from two different rats that performed the experiment for the first time. Place fields are at corresponding locations in both chambers. The pattern correlates to the idealized local cue-reliant firing pattern. (B) Paradigm-familiar sessions: two representative examples from two different rats that performed the experiment for the second (cell 3) and third (cell 4) time. Cell 3 develops no place field inside the opposing chamber that is reached via right turn from the entry arm (3.2B, 4.2A, 5B). Cell 4 forms a new place field inside chambers of Trial 3.2B, 4.2A and 5B. The correlation pattern of both cells correlates to the idealized trajectory-reliant firing pattern. (C) Illuminated sessions: two representative examples of two different rats that performed the experiment under illuminated conditions. Place fields do not form at corresponding locations between both chambers, but remain at the same location within chamber “A” and “B”. The correlation pattern correlates to the idealized “absolute” direction-reliant firing pattern.