Purpose To explore the role of posterior cingulate cortex(PCC) dysfunction in the pathogenesis of depression and its relationship with the clinical features of depression by analyzing the effective connection among the inner areas of PCC of patients in depression. Materials and Methods The spectral dynamic causal model(spDCM) was used to analyze the resting state functional magnetic resonance imaging(fMRI) data from the PCC inner areas Brodmann area(BA) 23, BA29, BA30, BA31 in the major depressive disorder ...