Double contrasts of State (M-RS minus S-RS) and Group (PTSD vs control) revealed different effects of state (i.e., visual stimulation) on connectivity between the groups. Greater connectivity reduction from S-RS to M-RS appeared in the PTSD (vs control) group in VC→PCC (t = −2.22, p = 0.032, d = 0.54) and VC→mPFC (t = −2.18, p = 0.036, d = 0.53). Specifically, from S-RS to M-RS, significant connectivity reduction emerged in VC→PCC (t = −2.84, p = 0.011, FDR p < 0.05, d = 0.69) and VC→mPFC (t = −3.04, p = 0.007, FDR p < 0.05, d = 0.74) in the PTSD group, but none in the control group (ps > 0.628). These group effects are also summarized in Table 2.
