Rapid treatment-induced brain changes in pediatric CRPS

Area of Science:

• Neuroscience
• Pediatric Pain Medicine
• Medical Imaging

Background:

• Complex Regional Pain Syndrome (CRPS) in children is poorly understood regarding brain changes.
• Previous research has not examined structural and functional brain alterations in pediatric CRPS patients due to disease or treatment.

Purpose of the Study:

• To investigate gray matter (GM) differences in children with CRPS compared to healthy controls.
• To assess GM and functional connectivity (FC) changes in pediatric CRPS patients after intensive interdisciplinary psychophysical pain treatment.

Main Methods:

• Magnetic resonance imaging (MRI) was used to compare 23 pediatric CRPS patients with 21 age- and sex-matched healthy controls.
• Structural MRI analyzed GM volume, and functional MRI assessed FC in relevant brain regions before and after treatment.

Main Results:

• CRPS patients exhibited reduced GM in motor, sensory, cognitive, and emotional brain regions compared to controls.
• Following treatment, patients showed increased GM in the dorsolateral prefrontal cortex (dlPFC), thalamus, basal ganglia, amygdala, and hippocampus.
• Enhanced FC was observed between the dlPFC and periaqueductal gray, crucial for pain modulation.

Conclusions:

• Pediatric CRPS is associated with widespread GM abnormalities in sensory, motor, emotional, cognitive, and pain modulatory brain areas.
• This study provides the first evidence of rapid, treatment-induced changes in GM and FC in brain regions critical for sensation, emotion, cognition, and pain modulation in children with CRPS.