Alterations in neural morphology after developmental exposure to Pb.A, illustration of the exposure, differentiation, and assessment scheme for this work. B, representative images of differentiating cortical neurons at Day 10, 18, and 35. TBR2 stains for intermediate progenitor cells, TBR1 stains for immature neurons, and MAP2 stains for mature neurons. Scale bar = 20 μm. Total neurite length (top) and branch number (bottom) were quantified at (C) Day 25 and (D) Day 45. N ≥ 10 views from three independent differentiations. Data = mean ± SE. N.S., not significant; ∗p < 0.05 and ∗∗∗p < 0.001.