Dissociating hyper and hypoself biases to a core self-representation

Area of Science:

• Neuroscience
• Cognitive Psychology
• Social Cognition

Background:

• Self-related biases are observed in various cognitive tasks.
• It remains unclear if these tasks engage common self-representation mechanisms.
• Investigating brain lesions offers insight into distinct self-representation processes.

Observation:

• Two patients with distinct brain lesions were studied: Patient SC (left ventromedial prefrontal cortex and insula) and Patient RR (temporoparietal cortex).
• Patient SC exhibited a self-bias across perceptual matching and episodic memory tasks.
• Patient RR showed a self-bias only in perceptual matching tasks, with both patients displaying reward hypobias.

Findings:

• Left ventromedial prefrontal cortex (vmPFC) damage impairs a core self-representation influencing perception and memory.
• Temporoparietal (TP) cortex damage affects attentional responses to social cues, dissociating from reward effects.
• vmPFC is crucial for accessing core self-representation, while TP cortex damage impacts attentional control.

Implications:

• This research differentiates the neural substrates of self-representation in perception and memory.
• Findings suggest distinct roles for vmPFC and TP cortex in self-bias and attention.
• Understanding these dissociations advances knowledge of self-processing and social cognition in the brain.