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Cannabis analgesia in chronic neuropathic pain is associated with altered brain connectivity
Open accessAbstract
OBJECTIVE: To characterize the functional brain changes involved in δ-9-tetrahydrocannabinol (THC) modulation of chronic neuropathic pain. METHODS: Fifteen patients with chronic radicular neuropathic pain participated in a randomized, double-blind, placebo-controlled trial employing a counterbalanced, within-subjects design. Pain assessments and functional resting state brain scans were performed at baseline and after sublingual THC administration. We examined functional connectivity of the anterior cingulate cortex (ACC) and pain-related network dynamics using graph theory measures. RESULTS: THC significantly reduced patients' pain compared to placebo. THC-induced analgesia was correlated with a reduction in functional connectivity between the anterior cingulate cortex (ACC) and the sensorimotor cortex. Moreover, the degree of reduction was predictive of the response to THC. Graph theory analyses of local measures demonstrated reduction in network connectivity in areas involved in pain processing, and specifically in the dorsolateral prefrontal cortex (DLPFC), which were correlated with individual pain reduction. CONCLUSION: These results suggest that the ACC and DLPFC, 2 major cognitive-emotional modulation areas, and their connections to somatosensory areas, are functionally involved in the analgesic effect of THC in chronic pain. This effect may therefore be mediated through induction of functional disconnection between regulatory high-order affective regions and the sensorimotor cortex. Moreover, baseline functional connectivity between these brain areas may serve as a predictor for the extent of pain relief induced by THC.
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Eight studies within this review examined the treatment of anxiety with CBM in people living with chronic pain.
“Eight studies within this review examined the treatment of anxiety with CBM in people living with chronic pain.55,61,70,76,96–99”
From Clinical Practice Guidelines for Cannabis and Cannabinoid-Based Medicines in the Management of Chronic Pain and Co-Occurring Conditions (2024) · cites this paper as [61]
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Metadata
- Authors
- Weizman, L., Dayan, L., Brill, S., Nahman-Averbuch, H., Hendler, T., Jacob, G., & Sharon, H.
- Affiliations
- Cincinnati Children's Hospital Medical Center (US)
- From the Sagol Brain Institute (L.W., T.H., H.S.), Institute of Pain Medicine, Department of Anesthesiology and Critical Care Medicine (L.D., S.B., H.S.), and Department of Internal Medicine F (G.J.), Tel-Aviv Sourasky Medical Center; Sagol School of Neuroscience (L.W., T.H.) and Sackler School of Medicine (L.D., T.H., G.J., H.S.), Tel Aviv University, Israel; Department of Anesthesia (H.N.-A.), Cincinnati Children's Hospital Medical Center, OH; and Pain Management & Neuromodulation Centre (H.S....
- Venue
- Neurology
- Published
- 2018-10-02
- Volume
- 91
- Issue
- 14
- Pages
- e1285-e1294
- ISSN
- 0028-3878 (ISSN-L)
- 1526-632X
- PMC
- PMC6177269
- OpenAlex
- W2890434263
- Cited by
- 120
- References
- 36
- Citations by year
- 2026: 7 · 2025: 17 · 2024: 14 · 2023: 13 · 2022: 32 · 2021: 22 · 2020: 8 · 2019: 6 · 2018: 1
- FWCI
- 5.97
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Neurology (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Pharmacology (medical) › Cannabis and Cannabinoid Research
- Health Sciences › Medicine › Physiology (medical) › Pain Mechanisms and Treatments
- Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
- Keywords
- delta-9-tetrahydrocannabinol, chronic neuropathic pain, radicular pain, brain functional connectivity, resting-state functional connectivity, anterior cingulate cortex, dorsolateral prefrontal cortex, sensorimotor cortex, graph theory, treatment response prediction
- MeSH terms
- Administration, Sublingual, Adult, Analgesics, Brain, Brain Mapping, Double-Blind Method, Humans, Magnetic Resonance Imaging, Male, Neural Pathways, Neuralgia, Rest, Dronabinol, Chronic Pain, Pain Management, Medical Marijuana
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