Figure 4. Photomicrographs of serial tangential sections through layer 4C of V1 from an OHT brain. A: Section stained for CO histochemistry demonstrates ocular dominance bands in tangential sections through layer 4C of V1. Note the treated eye bands (d) demonstrate lighter, less dense CO staining. B: A serial section stained for GFAP immunohistochemistry demonstrates denser, more robust immunoreactivity in the ocular dominance bands associated with the treated eye (d). C: A serial section stained for MAC-1 immunohistochemistry demonstrates uniform immunoreactivity. Arrows point to high power photographs (100X) of the treated and normal ocular dominance bands stained for CO (D, E), GFAP (F, G), or MAC-1 (H, I). Note astrocytic profiles and processes in F and lack of labeled microglial profiles in H and I.