Chronic Low Back Pain Duration Alters Brain Network Connectivity in Pain, Emotion, and Cognitive Processing

Area of Science:

• Neuroscience
• Medical Imaging
• Pain Research

Background:

• Chronic low back pain (CLBP) is a prevalent condition with complex underlying mechanisms.
• Understanding neuroplastic changes in the brain associated with CLBP chronicity is crucial for effective treatment.

Purpose of the Study:

• To investigate differences in brain network connectivity between short-term and long-term CLBP patients.
• To explore the relationship between disease duration and brain network alterations in CLBP.

Main Methods:

• Retrospective analysis of 25 CLBP patients using 18F-fluorodeoxyglucose positron emission tomography/magnetic resonance (18F-FDG-PET/MR) imaging.
• Analysis of metabolic connectivity across 14 large-scale brain networks, including pain, emotion, and cognitive networks.
• Statistical assessment of differences using permutation testing with false discovery rate (FDR) correction.

Main Results:

• Significant differences in metabolic connectivity were observed between short-term and long-term CLBP groups.
• Altered connectivity was noted between the left executive control network (LECN) and visual networks, salience networks (SN/pSN), and ventral default mode network (vDMN).
• A positive correlation between CLBP duration and connectivity strength in the salience, posterior salience, and vDMN networks was identified.

Conclusions:

• CLBP chronicity is associated with significant alterations in brain network connectivity, particularly in networks involved in emotional processing and pain perception.
• These findings suggest neuroplastic changes occur with prolonged CLBP, offering insights into pain mechanisms.
• The identified alterations may represent potential therapeutic targets for managing chronic pain conditions.