Neural correlates of self-reflection in post-traumatic stress disorder

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Psychology

Background:

• Self-referential processing (SRP) involves evaluating information relative to oneself.
• Disturbances in SRP are increasingly observed in post-traumatic stress disorder (PTSD).
• Key brain regions like the medial prefrontal cortex (MPFC) and posterior cingulate cortex (PCC) are crucial for SRP and show altered function in PTSD.

Purpose of the Study:

• To investigate differences in neural activation during SRP between individuals with PTSD and healthy controls.
• To examine the role of the MPFC and PCC in SRP disturbances associated with PTSD.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to compare brain activity.
• Participants included 20 individuals with PTSD and 15 healthy controls.
• A SRP task assessed responses to self-relevant personal characteristics versus general facts.

Main Results:

• Healthy controls responded faster to self-relevant information than general facts, unlike individuals with PTSD.
• Controls showed greater MPFC and PCC activation for self-referential processing compared to general facts.
• Individuals with PTSD exhibited reduced MPFC activation during self-referential processing relative to general facts.

Conclusions:

• The findings implicate the MPFC in SRP disturbances observed in PTSD.
• Altered MPFC function during SRP may contribute to negative self-referential cognition in PTSD.
• These results support the inclusion of identity disturbances in PTSD diagnostic criteria.