Fig. 3.

Embryonic cell proliferation occurs near blood vessels in the cortex. A Confocal optical stacks reveal the overall spatial organization of mitotic intermediate progenitor cells (H3+Tbr2+) in relation to blood vessels (IB4+) in the embryonic SVZ. As expected, there are no TB2+ progenitors in the ganglionic eminence (GE). Scale bar = 400 μm. CTX = Cerebral cortex. B Higher magnification of the area indicated by the rectangle in A, showing individual channels. They illustrate examples of dividing intermediate progenitor cells that are in close proximity to the cortical vascular plexi. Scale bar = 50 μm.