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

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.