Extended Data Fig. 1: Representative histology.
From: Recalibration of path integration in hippocampal place cells
Coronal slices from the five rats used in this study. Arrows point to tetrode tracks at different stages of advancement towards CA1. Note that these are not always the termination of these tetrodes, simply one section along their tracks. In one rat (576), the histology was inconclusive owing to poor fixation and slice quality; however, we determined that the tetrodes were correctly placed in CA1 by the mediolateral placement of the bundle, tracks in the few sections that we could analyse, and features in the EEG signals observed during recording (for example, sharp waves and ripples). In one rat (638), two of the most medial tetrodes (not shown) appeared to record from the fasciola cinereum, rather than CA1.
