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Altered resting-state functional connectivity in complex regional pain syndrome
Anne Bolwerk1, Frank Seifert, Christian Maihöfner
1Department of Neurology, University Hospital Erlangen, Erlangen, Germany; Department of Physiology and Pathophysiology, University of Erlangen-Nuremberg, Erlangen, Germany.
Patients with complex regional pain syndrome exhibit altered brain connectivity, particularly in the default mode network and sensorimotor regions. These changes correlate with neuropathic pain intensity, offering insights into CRPS brain function.
Area of Science:
- Neuroscience
- Medical Imaging
- Pain Research
Background:
- Complex Regional Pain Syndrome (CRPS) is a debilitating condition characterized by chronic pain.
- Understanding the neural underpinnings of CRPS is crucial for developing effective treatments.
- Resting-state functional connectivity offers insights into brain network alterations in neurological disorders.
Purpose of the Study:
- To investigate functional brain connectivity alterations in patients with CRPS at rest.
- To explore the association between these connectivity changes and neuropathic pain.
- To compare resting-state functional connectivity in CRPS patients with healthy controls.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to assess brain connectivity.
- Seed voxel correlation analysis and independent component analysis were employed.
- Analysis of covariance related connectivity changes to clinical pain symptoms.
Main Results:
- CRPS patients showed reduced functional connectivity within the default mode network compared to controls.
- Sensorimotor cortex (S1/M1) and intraparietal sulcus (IPS/MIP) exhibited more diffuse connectivity in CRPS patients.
- Healthy controls displayed greater intraregional connectivity within S1/M1 and IPS/MIP.
- A trend indicated a correlation between altered connectivity and neuropathic pain intensity.
Conclusions:
- CRPS is associated with significant spatial alterations in resting-state functional connectivity.
- These brain network changes provide further understanding of CRPS pathophysiology.
- Findings contribute to the broader understanding of brain function in chronic pain conditions.
