Figure 5.

Many cortical terminal fields are unconstrained by cytoarchitectural boundaries. Backset, Schematic section adapted from Allen Mouse Brain Reference Atlas (panel 74; http://mouse.brain-map.org/static/atlas). Red overlay represents region shown at high power. Frontset, A field of labeled S1 terminals spanning the parafascicular, posterior medial nucleus, and pulvinar. Bottom right, Scale bar, 50 µm. Insets, Terminals are evident across this swath, not just in the most densely labeled regions. Morphology varies, with smaller terminals in the parafascicular (left) compared with the posterior medial nucleus (right). Inset, Scale bar, 5 µm.