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Light-microscopic images of normal pyramidal cells and the TUNEL positive cells (arrows) in coronal sections of rat hippocampus in different groups. TUNEL positive cells which appear in the area have irregular cytoplasms with shrinkage and brown nuclei. A section from control group showing normal pyramidal cells (A). B, C, D and E show the sections from PTZ group and Ext 50-PTZ, Ext 100-PTZ and Ext 200-PTZ groups, respectively.
