Grey and white matter differences in Chronic Fatigue Syndrome - A voxel-based morphometry study

Area of Science:

• Neuroimaging
• Neurology
• Medical Research

Background:

• Chronic Fatigue Syndrome (CFS) is a complex disorder with poorly understood neurobiological underpinnings.
• Previous research suggests potential structural brain abnormalities in CFS patients.

Purpose of the Study:

• To investigate global and regional grey matter (GM) and white matter (WM) volumes in CFS patients.
• To utilize advanced voxel-based morphometry (VBM) methods with 3-Tesla MRI.

Main Methods:

• Magnetic resonance imaging (MRI) scans of 42 CFS patients and 30 healthy controls.
• Voxel-based morphometry (VBM) analysis on segmented and normalized anatomical MRI scans.
• Randomisation methods to identify group differences in GM and WM volumes.

Main Results:

• CFS patients exhibited larger overall GM volume and lower overall WM volume compared to controls, after accounting for total intracranial volume.
• Voxel-wise analysis revealed increased GM volume in the amygdala and insula in CFS patients.
• Reduced WM volume was observed in the midbrain, pons, and right temporal lobe of CFS patients.

Conclusions:

• Elevated GM volume in CFS is associated with brain regions involved in interoceptive signal and stress processing.
• Decreased WM volume in specific brain areas supports prior findings of WM abnormalities in CFS, particularly in the midbrain and brainstem.