Figure 3. Visuotopic maps of V1 inputs to V2 orientation columns in 4 representative cases.

(A) Visual field maps of POs and retinotopic layout of labeled V1 cells for case MK373-CTB647 (same case as in Fig. 2A–B). LEFT: Each labeled V1 cell is represented as a black oriented line segment centered on each cell’s RF location in visual space with the line orientation corresponding to the cell’s PO. RIGHT: the same map is shown as a color-coded version, in which the colors of lines indicate the number of labeled cells (in logarithmic scale) mapped at each cell’s RF location in visual space. (B-D) Same as in (A) but for different injection cases as indicated (same cases as in Fig. 2). Whereas relative cell density is better revealed by the color maps, the overall pattern of the V1 inputs is better captured by the black maps. The visuotopic maps for the reminder of cases are shown in Extended Data Fig. 3.