Figure 4From: Single-prolonged stress induces apoptosis in dorsal raphe nucleus in the rat model of posttraumatic stress disorder The mean optical densities of Cyt-C expression was shown at different time points in dorsal raphe nucleus, and peaked at SPS 7d (mean ± SEM). P < 0.001 SPS vs. control group. Tukey’s test: ▲P < 0.05 SPS 1d vs. control group. ●P < 0.05 SPS 7d vs. SPS 1d. ■P < 0.05 SPS 14d vs. SPS 7d.Back to article page