(A–D) Coronal images from 56L. (E and F) confocal images from SSp (E) and VISp (F) from 56L. (G–J) Coronal sections from P162. (K and L) Confocal images from SSp (K) and VISp (L) from P162. (M–P) Coronal images from P139. (Q) Confocal image from P139 SSs. Sections were taken from 0.7 mm (A, G, and M), 1.7 mm (B, D, H, J, N, and P), 2.3 mm (C, I, and O) caudal from bregma. (R–W) tet-reporter virus injection into 56L SSp (R), 56L SSs (T), P162 SSp (V), and P139 SSs (X) and their projection to thalamus (S, U, W, and Y, respectively). (Z) Schematic view of projections in layer 6 lines. ILM: interlaminar nucleus, Po: posterior complex, VPM: ventral posteomedial nucleus. Scale bars: 500 μm.