1. Fronto-limbic disconnection in depressed patients with suicidal ideation: A resting-state functional connectivity study
- Author
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Yixiao Fu, Dejian Tang, Jinkun Zeng, Lian Du, Huaqing Meng, Yongmei Li, and Huan Liu
- Subjects
Adult ,Male ,medicine.medical_specialty ,Emotions ,Audiology ,Gyrus Cinguli ,behavioral disciplines and activities ,Suicidal Ideation ,Temporal lobe ,Correlation ,03 medical and health sciences ,0302 clinical medicine ,mental disorders ,medicine ,Humans ,Suicidal ideation ,Depression (differential diagnoses) ,Anterior cingulate cortex ,Depressive Disorder, Major ,Resting state fMRI ,medicine.disease ,Magnetic Resonance Imaging ,Temporal Lobe ,030227 psychiatry ,Psychiatry and Mental health ,Clinical Psychology ,medicine.anatomical_structure ,nervous system ,Major depressive disorder ,Female ,Disconnection ,medicine.symptom ,Psychology ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
Background Suicidal ideation (SI) is highly prevalent and a known symptom of Major Depressive Disorder (MDD), but its underlying biological mechanisms are relatively unknown. Several studies linked suicidal ideation to dysfunctional brain circuits, specifically fronto-limbic connections. The purpose of this work was to investigate fronto-limbic disconnection in MDD patients with or without SI. Methods MDD patients with SI (SI, n=28) or without SI (NSI, n=20), identified by the Scale for Suicide Ideation and healthy controls (HCs, n=30) underwent resting-state functional MRI scanning. The functional properties of correlations in neural activity (intrinsic functional connectivity, iFC) of the rostral anterior cingulate cortex (rACC) were analyzed among the three groups. Furthermore, correlation analyses between iFC, SI severity and depression severity were performed. Results We found that the SI group exhibited decreased iFC between the rACC, the orbitomedial prefrontal cortex and the right middle temporal pole compared to HCs and NSI groups. The NSI group showed decreased iFC between the rACC and the orbitomedial prefrontal cortex compared to HCs. In the SI group, iFC strength between the right rACC and the middle temporal pole positively correlated with SI severity. Conclusion Transdiagnostic and diagnosis-specific alterations of fronto-limbic iFC were found in MDD patients with or without SI. Disrupted fronto-limbic circuits may impact decision-making and emotional processing in SI. These results provide useful information about the pathophysiological mechanisms of MDD patients with SI.
- Published
- 2017
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