Effects of cannabinoids on resting state functional brain connectivity: A systematic review

Valentina Lorenzetti, Alexandra Gaillard, Diny Thomson, Amir Englund, Tom P. Freeman

Research output: Contribution to journalReview articlepeer-review

3 Citations (SciVal)

Abstract

Cannabis products are widely used for medical and non-medical reasons worldwide and vary in content of cannabinoids such as delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). Resting state functional connectivity offers a powerful tool to investigate the effects of cannabinoids on the human brain. We systematically reviewed functional neuroimaging evidence of connectivity during acute cannabinoid administration. A pre-registered (PROSPERO ID: CRD42020184264) systematic review of 13 studies comprising 318 participants (mean age of 25 years) was conducted and reported using the PRISMA checklist. During THC and THCv exposure vs placebo reduced connectivity with the NAcc was widely reported. Limited evidence shows that such effects are offset by co-administration of CBD. NAcc-frontal region connectivity was associated with intoxication levels. Cannabis intoxication vs placebo was associated with lower striatal-ACC connectivity. CBD and CBDv vs placebo were associated with both higher and lower connectivity between striatal-prefrontal/other regions. Overall, cannabis and cannabinoids change functional connectivity in the human brain during resting state as a function of the type of cannabinoid examined.

Original languageEnglish
Article number105014
JournalNeuroscience and Biobehavioral Reviews
Volume145
Early online date20 Dec 2022
DOIs
Publication statusPublished - 28 Feb 2023

Bibliographical note

Funding Information:
We thank — for her contribution to data extraction to an early draft of the manuscript. Valentina Lorenzetti was supported by an Al and val Rosentrauss Research Fellowship, by an NHMRC Investigator Fellowship and by an Australian Catholic University competitive scheme. We thank Arush Honnedevasthana Arun‬ for reviewing of content in tables. ‬

Keywords

  • Cannabidiol (CBD)
  • Cannabinoids
  • Cannabis
  • Functional magnetic resonance imaging (fMRI)
  • Resting state functional connectivity
  • Tetrahydrocannabinol (THC)

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Cognitive Neuroscience
  • Behavioral Neuroscience

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