Fig. 6

Propidium iodide (PI) staining of prefrontal slices following radiation. (A) Representative samples showing a graded increase in PI intensity with radiation dose. Arrow shows clustering of PI intensity at 100 Gy. Left panel shows approximate location of secondary motor cortex (M2), Prelimbic cortex (PrL), medial orbital cortex (MO), ventral orbital cortex (VO), lateral orbital cortex (LO), and dorsolateral orbital cortex (DLO), (B) Mean PI intensity (“a.u.”: arbitrary units).