L6CCs Cluster around Deep-Layer Terminal Fields of Primary TC Axons
(A) Examples of in vivo labeled L4SP, L6CC, and VPM axon in rat vS1.
(B) Somata of L4SPs (n = 37) and L6CCs (n = 14) cluster around the two innervation peaks of VPM axons (n = 14; mean ± SD). Somata of L6CCs intermingle with those of the subcortically projecting L5PTs (n = 38) and L6CTs (n = 13).
(C) L4SP and L6CC axons (mean ± SD; same cells as in B) versus cytoarchitectonic layer borders (Meyer et al., 2013).