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• W1966852679 abstract "Pre-extinction administration of Δ9-tetrahydrocannibinol (THC) facilitates recall of extinction in healthy humans, and evidence from animal studies suggest that this likely occurs via enhancement of the cannabinoid system within the ventromedial prefrontal cortex (vmPFC) and hippocampus (HIPP), brain structures critical to fear extinction. However, the effect of cannabinoids on the underlying neural circuitry of extinction memory recall in humans has not been demonstrated. We conducted a functional magnetic resonance imaging (fMRI) study using a randomized, double-blind, placebo-controlled, between-subjects design (N = 14/group) coupled with a standard Pavlovian fear extinction paradigm and an acute pharmacological challenge with oral dronabinol (synthetic THC) in healthy adult volunteers. We examined the effects of THC on vmPFC and HIPP activation when tested for recall of extinction learning 24 h after extinction learning. Compared to subjects who received placebo, participants who received THC showed increased vmPFC and HIPP activation to a previously extinguished conditioned stimulus (CS + E) during extinction memory recall. This study provides the first evidence that pre-extinction administration of THC modulates prefrontal–limbic circuits during fear extinction in humans and prompts future investigation to test if cannabinoid agonists can rescue or correct the impaired behavioral and neural function during extinction recall in patients with PTSD. Ultimately, the cannabinoid system may serve as a promising target for innovative intervention strategies (e.g. pharmacological enhancement of exposure-based therapy) in PTSD and other fear learning-related disorders." @default.
• W1966852679 created "2016-06-24" @default.
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• W1966852679 date "2014-09-01" @default.
• W1966852679 modified "2023-10-17" @default.
• W1966852679 title "Cannabinoid modulation of prefrontal–limbic activation during fear extinction learning and recall in humans" @default.
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• W1966852679 doi "https://doi.org/10.1016/j.nlm.2013.09.009" @default.
• W1966852679 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3960373" @default.
• W1966852679 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24055595" @default.
• W1966852679 hasPublicationYear "2014" @default.
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