Figure 6.

Recording tracks plotted in stereotaxic coordinates. Stereotaxic coordinates based on the following zero references: rostrocaudal, lambda; mediolateral, midline; dorsoventral, dorsal surface of the midline vermis at 1.5 mm caudal to lambda (λ − 1.5). A, Dorsal view of the location of all electrode tracks across all animals showing the coverage of penetrations; each plus sign represents one electrode track. B–D, Stereotaxic coordinates of electrode recording locations in which a periocular microzone field potential was recorded across all animals. Each point represents the coordinates at which the largest-amplitude CFP for periocular microzones (circles) and C2 zones (triangles) was recorded for a single electrode track. B and C show these for coronal and sagittal projections, respectively. D, The same points shown in coronal sections at different rostrocaudal (RC) levels between λ and λ − 2.5 mm. Vertical lines in D represent single electrode tracks across all experiments. Colored symbols (periocular microzones, red; C2 zones, blue) and solid lines indicate CFP loci and tracks for which accurate histological reconstruction was possible. Anatomical directions are marked with arrows for reference. R, Rostral; C, caudal; M, medial; L, lateral; D, dorsal; Ve, ventral.