Re-experiencing trauma: Occipital lobe resting-state functional connectivity in posttraumatic stress disorder
C A Sanders1, M A Ruder1, S E Bruce2
1Department of Psychological Sciences, University of Missouri-St. Louis, One University Boulevard, St. Louis, MO 63121, USA.
Psychiatry Research. Neuroimaging
|July 18, 2026
Summary
This study found that increased visual cortex (V3) to cerebellum connectivity in women with posttraumatic stress disorder (PTSD) is linked to re-experiencing symptoms, particularly nightmares and physiological reactivity.
Area of Science:
- Neuroscience
- Psychiatry
- Medical Imaging
Background:
- Posttraumatic stress disorder (PTSD) is characterized by re-experiencing symptoms, often involving visual imagery.
- Occipital resting-state functional connectivity (rsFC) is understudied in PTSD, especially in women survivors of interpersonal violence.
- Understanding neural mechanisms of sensory processing disturbances is crucial for intrusive memory research.
Purpose of the Study:
- To investigate occipital rsFC in relation to PTSD re-experiencing symptoms using the Posttraumatic Stress Diagnostic Scale (PDS).
- To explore neural correlates of sensory and contextual processing deficits contributing to intrusive memories in trauma-exposed females.
- To identify potential neural markers for symptom-targeted interventions in PTSD.
Main Methods:
- Sixty-three women meeting DSM-IV criteria for PTSD underwent resting-state fMRI scans.
- Seed-based voxelwise rsFC analyses were performed using bilateral visual cortex seeds (V1, V2, V3).
- Associations between rsFC and PTSD symptom severity (CAPS-IV, PDS) were examined, focusing on re-experiencing symptoms.
Main Results:
- Greater V3-left cerebellar connectivity positively correlated with PDS re-experiencing subscores.
- Item-level analyses indicated this association was driven by nightmares and physiological reactivity.
- Increased V3-cerebellar connectivity may reflect heightened coupling between visual and sensorimotor/regulatory systems.
Conclusions:
- Heightened V3-cerebellar connectivity is associated with PTSD re-experiencing symptoms, particularly nightmares and physiological reactivity, in trauma-exposed females.
- This neural interaction may be a specific marker for re-experiencing symptoms rather than global PTSD severity.
- Findings suggest a potential neural target for interventions aimed at reducing intrusive memories in PTSD.
Related Concept Videos
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Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
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01:20Traumatic Memory
Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual remembers mundane...
01:21Association Areas of the Cortex
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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