Morphology of area CA1b pyramidal neurons in adult hippocampal slices subjected to OGD (7 min) and reoxygenated for 3 hr. Sections (30 μm) were prepared from hippocampal slices and stained with cresyl violet as described in Materials and Methods. A, control. B, OGD. Note the mild shrinkage of neurons, indicated by arrows (C), OGD plus diazepam (5 μm, added after OGD). Scale bar, 50 μm.