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Related Experiment Videos

Cannabinoids and the cholinergic system.

E F Domino

    Journal of Clinical Pharmacology
    |August 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Tetrahydrocannabinol (THC) reduces brain activity and acetylcholine release, particularly in the hippocampus. This suggests THC depresses the brain stem activating system, impacting neural function.

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    Area of Science:

    • Neuroscience
    • Pharmacology

    Background:

    • Cannabinoids, including delta-9-Tetrahydrocannabinol (THC), are known psychoactive compounds.
    • Acetylcholine is a key neurotransmitter involved in brain activation and cognitive functions.

    Purpose of the Study:

    • To investigate the effects of THC on electroencephalogram (EEG) activation and acetylcholine (ACh) release in the brain.
    • To determine if THC depresses the brain stem activating system.

    Main Methods:

    • Electrophysiological recordings of EEG activity in cats.
    • Measurement of acetylcholine release from the neocortex.
    • Administration of delta-8- and delta-9-THC to rodents (mice and rats).

    Main Results:

    • THC decreased EEG activation and induced slow-wave activity in cats.

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  • A concomitant decrease in neocortical acetylcholine release was observed with THC administration.
  • Large doses of THC increased brain acetylcholine levels in rodents, but minimal doses did not.
  • THC significantly reduced brain acetylcholine utilization, primarily in the hippocampus.

    • Conclusions:

    • THC appears to depress the brain stem activating system.
    • The primary mechanism involves reduced acetylcholine utilization in the hippocampus.