A cell pair consisting of an internal direction cell (ID, green) with a putative projection to a conjunctive grid cell (Conj., pink). Temporal cross-correlogram of firing rates (left), directional tuning (middle) and position tuning (right) (rate expressed by colour intensity, ranging from the 10 th to the 99 th percentile of each cell’s firing-rate map) for the putative pre- and postsynaptic cells. Note the similar preferred direction of the two cells (middle).
