Resting state electrical brain activity and connectivity in fibromyalgia

Area of Science:

• Neuroscience
• Pain Medicine
• Medical Imaging

Background:

• The precise mechanisms of fibromyalgia remain elusive, with theories suggesting enhanced central nervous system sensitization.
• Dysfunctional descending inhibitory pathways and increased facilitatory modulation are implicated in fibromyalgia pathophysiology.

Purpose of the Study:

• To identify specific neural circuits contributing to central pain abnormalities in fibromyalgia.
• To investigate functional connectivity between the default mode network and executive attention network in fibromyalgia patients.

Main Methods:

• Resting-state source-localized electroencephalography (EEG) was employed.
• Neural activity was compared between 44 fibromyalgia patients and 44 healthy controls.

Main Results:

• The pregenual anterior cingulate cortex plays a significant role in fibromyalgia.
• Limited functional connectivity between the dorsal lateral prefrontal cortex and posterior cingulate cortex was observed, potentially impairing pain inhibition.
• Decreased functional connectivity with the pregenual anterior cingulate cortex appears to limit this inhibitory pathway.

Conclusions:

• Fibromyalgia is characterized by altered functional dynamics within integrated brain networks.
• The findings underscore the importance of both activation levels and inter-regional brain connectivity in fibromyalgia.