Figure 2. Morphological changes in hippocampal CA1 region in the three groups. (A) Morphological changes in hippocampal CA1 region in the three groups (100×/400×); (B) The number of degenerated cells in the hippocampus; (C) Diagram of TUNEL assay results; (D) The number of apoptotic cells in hippocampus of the three groups. **P<0.01.