Fig. 1.
The hippocampal levels of p-ErbB4 and ErbB4 after neuregulin 1 (NRG1)-β1 injection at different time points. The hippocampal p-ErbB4 levels increased significantly and peaked 1 h after the injection of NRG1-β1 (A, B) without significant change in ErbB4 levels (A, C). Data are mean ± SD. (*P < 0.05, **P < 0.01, ***P < 0.005 vs. the 0 h group.)