Cognitive control associated with irritability induction: an autobiographical recall fMRI study

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Science

Background:

• Irritability is crucial in psychiatric disorders but its neurobiological underpinnings are understudied.
• Understanding the brain basis of irritability is vital for treatment and classification.

Purpose of the Study:

• To investigate the brain circuitry associated with personal script-driven irritability in healthy individuals.
• To identify specific brain regions activated during induced irritability using functional magnetic resonance imaging (fMRI).

Main Methods:

• fMRI was used to record blood oxygen level-dependent (BOLD) signal changes.
• Participants listened to personal scripts of irritability, happiness, or neutral content.
• Self-rated emotions and skin conductance were measured, with data analyzed using cluster-wise nonparametric tests.

Main Results:

• Irritability scripts uniquely activated the left subgenual anterior cingulate cortex and left dorsal prefrontal cortex (medial, anterolateral, posterolateral).
• Increased BOLD signal in these regions was specific to irritability induction.
• Dorsomedial and posterolateral prefrontal regions also showed activation during happiness induction.

Conclusions:

• Irritability induction involves functional changes in specific brain regions, including the prefrontal and cingulate cortices.
• These changes may reflect cognitive control processes that become prominent during irritability.
• The findings contribute to understanding the neurobiology of emotional states.