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Marihuana and temporal disintegration.

F T Melges, J R Tinklenberg, L E Hollister

    Science (New York, N.Y.)
    |May 29, 1970
    PubMed
    Summary
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    High doses of marihuana extract containing Delta-1-tetrahydrocannabinol impaired cognitive coordination and sequential thinking. This effect was linked to difficulties with immediate memory recall.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Pharmacology

    Background:

    • Marihuana and its psychoactive components, like Delta-1-tetrahydrocannabinol (THC), are known to affect cognitive functions.
    • Understanding the specific impact of oral THC on complex cognitive tasks is crucial for assessing its functional consequences.

    Purpose of the Study:

    • To investigate the effects of high oral doses of marihuana extract, specifically Delta-1-tetrahydrocannabinol, on cognitive operations.
    • To determine if THC impairs the ability to coordinate sequential cognitive processes and its relation to memory.

    Main Methods:

    • Participants were administered oral doses of marihuana extract standardized for Delta-1-tetrahydrocannabinol content.
    • Cognitive performance was assessed using a task requiring serial adjustments and sequential goal-directed actions.

    Related Experiment Videos

  • Immediate memory capacity was evaluated.

    • Main Results:

    • High oral doses of marihuana extract significantly disrupted the serial coordination of cognitive operations.
    • Impairment was observed in tasks demanding sequential adjustments to achieve a goal.
    • The observed disintegration of sequential thought was correlated with deficits in immediate memory.

    Conclusions:

    • Oral administration of high-dose Delta-1-tetrahydrocannabinol negatively impacts complex cognitive functions, specifically sequential processing.
    • Impaired immediate memory appears to be a contributing factor to the observed cognitive deficits.
    • These findings highlight the potential for THC to disrupt goal-directed behavior requiring intricate cognitive sequencing.