(A) NeuN immunohistochemistry (a1–a4) and F-J B histofluorescence staining (b1–b4) in the CA1 area of the PYC/sham (a1,b1), PYC/SA/sham (a2,b2), PYC/TFI (a3,b3), and PYC/SA/TFI (a4,b4) groups at 5 days after TFI. In the PYC/SA/TFI group, a few NeuN+ CA1 pyramidal cells (arrows) and many F-J B+ CA1 pyramidal cells (asterisk) are observed. SO, stratum oriens; SP, stratum pyramidale; SR, stratum radiatum. Scale bar = 10 μm. (B,C) The mean numbers of NeuN+ (B) and F-J B+ cells (C) in the CA1 area. The bars indicate the means ± SEM (n = 7/group, *** p < 0.001 vs. PYC/sham group, ###
p < 0.001 vs. PYC/TFI group).