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Related Concept Videos

Depressive Disorders: MDD and Dysthymia01:27

Depressive Disorders: MDD and Dysthymia

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...
Depression: Overview01:18

Depression: Overview

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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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.
Biological Factors in Depression
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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Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity
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Relation between structural and functional connectivity in major depressive disorder.

Bart de Kwaasteniet1, Eric Ruhe, Matthan Caan

  • 1Department of Psychiatry, Brain Imaging Center, Amsterdam, the Netherlands. b.p.dekwaasteniet@amc.nl

Biological Psychiatry
|February 13, 2013
PubMed
Summary
This summary is machine-generated.

In major depressive disorder (MDD), reduced white matter integrity in the uncinate fasciculus is linked to increased functional connectivity in the frontolimbic network. This structure-function relationship correlates with depression severity.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Major depressive disorder (MDD) involves frontolimbic network abnormalities.
  • The relationship between structural and functional brain changes in MDD is not well understood.

Purpose of the Study:

  • To investigate the link between structural and functional connectivity within the frontolimbic network in MDD.
  • To explore how these changes relate to depression severity.

Main Methods:

  • Used diffusion tensor imaging to assess uncinate fasciculus integrity (connecting subgenual ACC to MTL).
  • Employed functional magnetic resonance imaging to measure functional connectivity between subgenual ACC and MTL.
  • Included 18 MDD patients and 24 healthy controls.

Main Results:

  • MDD patients showed reduced uncinate fasciculus white matter integrity.
  • Functional connectivity between subgenual ACC and MTL was enhanced in MDD.
  • A negative correlation between uncinate fasciculus integrity and subgenual ACC-hippocampal connectivity was found in MDD, associated with depression severity.

Conclusions:

  • Structural abnormalities in MDD are associated with heightened functional connectivity in the frontolimbic network.
  • These structure-function alterations are linked to the severity of depressive symptoms.
  • Structural deficits in MDD may drive increased functional connectivity within the frontolimbic network.