1. Cortical hierarchy disorganization in major depressive disorder and its association with suicidality.
- Author
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Lin Shiwei, Zhang Xiaojing, Zhang Yingli, Chen Shengli, Lin Xiaoshan, Xu Ziyun, Hou Gangqiang, and Qiu Yingwei
- Subjects
MENTAL depression ,SUICIDAL ideation ,SUICIDE risk factors ,LARGE-scale brain networks ,ATTEMPTED suicide - Abstract
Objectives: To explore the suicide risk-specific disruption of cortical hierarchy in major depressive disorder (MDD) patients with diverse suicide risks. Methods: Ninety-two MDD patients with diverse suicide risks and 38 matched controls underwent resting-state functional MRI. Connectome gradient analysis and stepwise functional connectivity (SFC) analysis were used to characterize the suicide risk-specific alterations of cortical hierarchy in MDD patients. Results: Relative to controls, patients with suicide attempts (SA) had a prominent compression from the sensorimotor system; patients with suicide ideations (SI) had a prominent compression from the higher-level systems; non-suicide patients had a compression from both the sensorimotor system and higher-level systems, although it was less prominent relative to SA and SI patients. SFC analysis further validated this depolarization phenomenon. Conclusion: This study revealed MDD patients had suicide risk-specific disruptions of cortical hierarchy, which advance our understanding of the neuromechanisms of suicidality in MDD patients. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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