Journal
NEUROSCIENCE
Volume 487, Issue -, Pages 143-154Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuroscience.2022.02.001
Keywords
Key words; chronic low back pain; thalamus; diffusion tensor imaging; probabilistic tractography; thalamo-sensorimotor circuit; resting-state functional connectivity
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Funding
- (NIH HEAL Initiative) [R01 AT008563, R33 AT009310, R33AT009341, R34DA046635]
- NIH [R01AG063975]
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This study used diffusion tensor imaging (DTI) and resting-state functional magnetic resonance imaging (functional connectivity) to analyze the anatomical and functional integrity of the thalamosensorimotor pathway in chronic low back pain (cLBP). The results showed increased anatomical connectivity of the left thalamo-motor pathway and altered resting-state functional connectivity of bilateral thalamo-motor/somatosensory pathways in cLBP patients.
dysfunction is thought to underlie the pathophysiology of chronic pain revealed by electroencephalographic studies. The thalamus serves as a primary relay center to transmit sensory information and motor impulses via dense connections with the somatosensory and motor cortex. In this study, diffusion tensor imaging (DTI) (probabilistic tractography) and resting-state functional magnetic resonance imaging (functional connectivity) were used to characterize the anatomical and functional integrity of the thalamosensorimotor pathway in chronic low back pain (cLBP). Fifty-four patients with cLBP and 54 healthy controls were included. The results suggested significantly increased anatomical connectivity of the left thalamo-motor pathway characterized by probabilistic tractography in patients with cLBP. Moreover, there was significantly altered resting-state functional connectivity (rsFC) of bilateral thalamo-motor/somatosensory pathways in patients with cLBP as compared to healthy controls. We also detected a significant correlation between pain intensity during the MRI scan and rsFC of the right thalamo-somatosensory pathway in cLBP. Our findings highlight the involvement of the thalamo-sensorimotor circuit in the pathophysiology of cLBP. (c) 2022 IBRO. Published by Elsevier Ltd. All rights reserved.
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