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Depressive Disorders: Etiology01:27

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Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
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Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
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Depressive Disorders: MDD and Dysthymia01:27

Depressive Disorders: MDD and Dysthymia

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Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
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Depression: Overview01:18

Depression: Overview

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Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Social anxiety disorder, also known as social phobia, is characterized by an intense fear of social situations where one might face humiliation, rejection, embarrassment, or negative evaluation. This disorder leads individuals to avoid activities like casual conversations, public speaking, or seemingly simple tasks such as eating, signing documents, or swimming, in public settings. Its impact extends beyond discomfort, often significantly interfering with daily functioning and quality of life.
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Attachment is a long-standing connection or bond with others. While Attachment Theory was conceived in developmental psychology to describe infant-caregiver bonding, it's been extended into adulthood to include romantic relationships. 
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相关实验视频

Updated: Jul 23, 2025

Design and Implementation of an fMRI Study Examining Thought Suppression in Young Women with, and At-risk, for Depression
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默认模式网络功能与结构的低调整与压缩和化相关.

Paul J Thomas1, Alex Leow1, Heide Klumpp2

  • 1Department of Biomedical Engineering, University of Illinois Chicago, Chicago, Illinois.

Biological psychiatry. Cognitive neuroscience and neuroimaging
|July 19, 2023
PubMed
概括

默认模式网络 (DMN) 中的大脑信号对齐在内化障碍患者中减少,并与抑郁症和反有关. 这项研究使用图形信号处理来分析这些条件下的大脑网络功能.

关键词:
抑郁症 抑郁症 抑郁症图表拉普拉斯的图形拉普拉斯的图形图形信号处理 图形信号处理神经成像是一种神经成像.化 化 化 化

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科学领域:

  • 神经科学是一个神经科学.
  • 图形信号处理 图形信号处理
  • 精神病学是一个精神病学.

背景情况:

  • 图形信号处理 (GSP) 工具量化大脑功能与白质结构的对齐.
  • 这一框架应用于具有内化精神病理 (情绪和焦虑障碍) 的跨诊断队列.
  • 这项研究研究了默认模式网络 (DMN) 调整与抑郁症/反症状之间的关系.

研究的目的:

  • 应用GSP来分析DMN信号对齐在内部化精神病理.
  • 为了确定DMN信号对齐是否与抑郁和反有关.
  • 探索DMN功能连接和结构网络拓之间的联系.

主要方法:

  • 从60名患者和19名健康对照中获得了扩散权重和静止状态功能性MRI数据.
  • 参与者接受了12周的治疗 (SSRI或CBT),并重新评估症状.
  • GSP方法量化了与白质结构网络的功能信号对齐.

主要成果:

  • 与对照组相比,在内化精神病理的患者中,后部DMN信号对齐性下降.
  • 降低信号对齐与基线抑郁和反得分负相关.
  • 后部DMN信号对齐与DMN内部与DMN外功能连接的比率相关.

结论:

  • 这些发现支持以前关于内化障碍后部DMN连接的文献.
  • 这是第一个GSP分析在一个跨诊断队列与内化精神病理.
  • 改变的DMN信号对齐可能是抑郁症和反的神经标记.