Microscopy from Scientific Research

Theta-rhythmic directional cells are localized primarily in the parasubiculum. Left, serial sagittal sections (lateral to medial) from rat 25953 showing tracks from a four-shank Neuropixels 2.0 probe in the parasubiculum (PaS, yellow) and MEC (orange). Each section contains the track from one shank (about 250 m apart). Directions: L, lateral; M, medial; A, anterior; P, posterior; D, dorsal; V, ventral. Right, fraction of theta-rhythmic internal direction cells (green) and pure grid cells (blue) along the probe shanks (proportion of all cells at corresponding depths). Black segments on the shanks show active recording sites (combining seven sessions with different site configurations).

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