Metacognitive evaluation, self-relevance, and the right prefrontal cortex.

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Social Cognition

Background:

• Metacognitive evaluations (MEs) are crucial for conscious awareness.
• Previous research consistently links ME to medial prefrontal cortex (mPFC) activation.
• Distinct research streams on ME have independently identified mPFC as a key region.

Purpose of the Study:

• To directly compare brain activation during metacognitive evaluations of oneself versus a significant other.
• To investigate the neural correlates of self-referential processing within metacognition.
• To identify brain regions differentially engaged by self-evaluation versus other-evaluation.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was employed in 19 healthy young adults.
• Participants performed self-evaluation (SE), significant other-evaluation (OE), and semantic positivity-evaluation (SPE) tasks.
• A direct comparison between SE and OE conditions was conducted using random-effects analyses.

Main Results:

• Both SE and OE conditions showed common medial prefrontal cortex activation compared to the SPE control.
• A direct comparison revealed significantly greater activation in the right dorsolateral prefrontal cortex during self-evaluation (SE) versus other-evaluation (OE).
• Increased right prefrontal cortex (PFC) activation correlated with the degree of self-relevance.

Conclusions:

• The study provides direct neuroimaging evidence comparing self- and other-related metacognition.
• Medial prefrontal cortex is commonly involved in evaluating both self and others.
• The right prefrontal cortex shows heightened engagement for self-relevant metacognitive evaluations.