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Patients with pain disorder show gray-matter loss in pain-processing structures: a voxel-based morphometric study
Michael Valet1, Harald Gündel, Till Sprenger
1Neurologische Klinik, Klinikum rechts der Isar, Technische Universität München, München, Germany. valet@lrz.tum.de
Psychosomatic Medicine
|December 17, 2008
Summary
Structural brain changes, specifically gray matter decreases in key emotional and pain processing areas, are linked to pain disorder. These findings highlight central nervous system alterations in functional pain syndromes.
Area of Science:
- Neuroscience
- Psychiatry
- Radiology
Background:
- Pain disorder involves chronic pain with psychological factors, and neuroimaging suggests altered pain processing.
- Previous studies indicate differences in brain activity and structure in individuals with functional pain disorders.
Purpose of the Study:
- To determine if functional changes in pain disorder correlate with structural alterations in the brain.
- To investigate differences in gray matter density between patients with pain disorder and healthy controls.
Main Methods:
- Magnetic resonance imaging (MRI) was used to examine 14 women with pain disorder and 25 healthy women.
- Voxel-based morphometry analyzed gray matter density, controlling for age and depression scores.
Main Results:
- Patients with pain disorder exhibited significant gray matter decreases in the prefrontal cortex, cingulate cortex, and insular cortex.
- These brain regions are crucial for modulating subjective pain perception.
Conclusions:
- Structural changes in fronto-limbic circuits may serve as objective markers for functional pain syndromes like pain disorder, fibromyalgia, and chronic back pain.
- These findings underscore the critical role of central nervous system changes in the pathophysiology of pain disorder.
