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Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
310

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fMRI features in recent suicide attempters performing the future imagination task.

Milad Esmaeil-Zadeh1, Morteza Fattahi1, Nafee Rasouli2

  • 1School of Electrical and Computer Eng., College of Engineering, University of Tehran, Tehran, Iran.

Psychiatry Research. Neuroimaging
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Summary

Individuals with recent suicide attempts show distinct brain activity during future thinking, with heightened responses to negative events and altered reward pathway activation. This suggests impaired emotional regulation and planning contributing to suicide risk.

Keywords:
Future imaginationMajor depressive disorder (MDD)NeurobiologySuicide attemptfMRI

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Negative future outlook is linked to depression and suicide risk.
  • Neural mechanisms of future thinking are crucial for understanding suicide.
  • This study investigates brain activity during future imagination in suicide attempters.

Purpose of the Study:

  • To identify brain activation patterns during future imagination in individuals with recent suicide attempts.
  • To compare neural responses between suicide attempters with major depressive disorder (SA+MDD), major depressive disorder (MDD) only, and healthy controls (HC).
  • To explore the neural correlates of future-oriented thinking in relation to suicide risk.

Main Methods:

  • fMRI was used to measure brain activation during a future imagination task.
  • Participants included 62 individuals categorized into SA+MDD, MDD, and HC groups.
  • The task involved imagining positive and negative future scenarios.

Main Results:

  • SA+MDD group exhibited increased activation in the left orbitofrontal cortex, cingulate, insula, and inferior frontal gyrus compared to MDD.
  • SA+MDD group showed decreased activity in the left parahippocampus and postcentral gyrus.
  • SA+MDD individuals reported lower reasons for living and higher suicidal ideation.

Conclusions:

  • Recent suicide attempters display heightened neural responses to negative future events, indicating increased threat perception and emotion dysregulation.
  • Hyperactivation in reward-related brain areas may contribute to suicidal behavior as an escape mechanism.
  • Reduced engagement of episodic memory systems may impair adaptive planning in individuals with a history of suicide attempts.