Figure 9. Ripple-associated replay occurred in box sessions, but was insensitive to the presence of a demonstrator on the track.
(A) Example replay events in a Post-box session. Left: a template firing sequence made of 10 cells during a lap running event on a trajectory, plotted similarly as in Figure 4A. Right: 3 examples of replay events, each plotted with the spike raster of the same 10 cells (top) and the CA1 LFP (bottom; filtered through the ripple band of 100–250 Hz). Each tick is a spike. Note the sequential firing of the cells in each replay example, similarly as in the template. (B) Number of replay events (red line) relative to the distribution of randomly-generated number of replays (black histogram) under each box condition. P: significance p-value. (C) Same as B, but for Pre-box and Post-box sessions with all box conditions combined. (B) Same as B, but for the Pre-box and Post-box session on the very first day under the Trained-demo and Empty-track conditions.