Fig. 9.

Schematic horizontal section of the rat brain showing the position of the microbeam just lateral to the midsaggital sulcus. Loss of putative oligodendrocytes (APC+) and astrocytes (glial fibrillary acidic protein, GFAP+) one week after exposure to a 270 μm wide, 650 Gy microbeam in the white matter of the rat brain (midsaggital sulcus) (work carried out in collaboration with John McDonald et al., Washington University).