Diagram showing the principal connections between brain regions containing place
cells (yellow), grid cells (red), HD cells (green), and angular velocity cells
(orange) (see Taube (2007)). Arrows
represent the direction of information flow. Solid lines indicate excitatory
projections, and lines with bar represent inhibitory projections. ADN,
anterodorsal thalamus; DTN, dorsal tegmental nucleus; HPC, hippocampus; LMN,
lateral mammillary nuclei; MEC, medial entorhinal cortex; PaS, parasubiculum;
PoS, postsubiculum.