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Brain Imaging Investigation of the Neural Correlates of Emotion Regulation
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Changes in brain function during negative emotion processing in the long-term course of depression.

Verena Enneking1, Melissa Klug1, Tiana Borgers1

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The British Journal of Psychiatry : the Journal of Mental Science
|January 27, 2022
PubMed
Summary
This summary is machine-generated.

Major depression relapses are common. This study found that brain activity in emotion processing areas normalized in patients who recovered, suggesting brain function may predict future relapses.

Keywords:
Depressive disordersemotion processingimaginglimbic systemrelapse

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Brain Imaging

Background:

  • Major depressive disorder (MDD) relapses are frequent, posing a significant disease burden.
  • While short-term studies show immediate post-treatment normalization of brain alterations in depression, long-term data are scarce.

Purpose of the Study:

  • To investigate longitudinal changes in brain function during negative emotion processing over two years in patients with MDD.
  • To correlate these brain function changes with the course of illness, specifically relapse versus no-relapse.

Main Methods:

  • A prospective case-control study involving 72 MDD patients and 42 healthy controls.
  • Participants underwent functional brain imaging during a negative emotional face processing task at baseline and after two years.
  • Patients were categorized into no-relapse (n=25) and relapse (n=47) subgroups based on their two-year illness course. Group-by-time interaction analyses were performed for key brain regions (amygdala, hippocampus, insula) and whole-brain activity.

Main Results:

  • A significant interaction between relapse status and time was observed in the amygdala, insula, and prefrontal/temporal cortex.
  • Patients with no relapse showed increased activity in these regions over time, while relapsed patients exhibited decreased activity.
  • At baseline, patients who did not relapse showed hypoactivity in the amygdala, hippocampus, and insula compared to both healthy controls and those who later relapsed.

Conclusions:

  • Brain activity changes during emotion processing are associated with the course of major depression.
  • Two-year remission in MDD is linked to a normalization of baseline hypo-responsiveness in emotion-related brain areas, reaching levels comparable to healthy controls.
  • Functional brain activity during emotion processing may serve as a predictive biomarker for future depressive relapses.