The chronic effects of cannabis on memory in humans: a review.

@article{Solowij2008TheCE,
  title={The chronic effects of cannabis on memory in humans: a review.},
  author={Nadia Solowij and Robert A. Battisti},
  journal={Current drug abuse reviews},
  year={2008},
  volume={1 1},
  pages={
          81-98
        }
}
Memory problems are frequently associated with cannabis use, in both the short- and long-term. To date, reviews on the long-term cognitive sequelae of cannabis use have examined a broad range of cognitive functions, with none specifically focused on memory. Consequently, this review sought to examine the literature specific to memory function in cannabis users in the nontoxicated state with the aim of identifying the existence and nature of memory impairment in cannabis users and appraising… 

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References

SHOWING 1-10 OF 110 REFERENCES
Long-term effects of frequent cannabis use on working memory and attention: an fMRI study
TLDR
No evidence was found for long-term deficits in working memory and selective attention in frequent cannabis users after 1 week of abstinence, but frequent cannabis use may affect brain function, as indicated by altered neurophysiological dynamics in the left superior parietal cortex during working memory processing.
Cognitive functioning of long-term heavy cannabis users seeking treatment.
TLDR
It is confirmed that long-term heavy cannabis users show impairments in memory and attention that endure beyond the period of intoxication and worsen with increasing years of regular cannabis use.
The acute effects of cannabinoids on memory in humans: a review
TLDR
This profile of effects suggests that cannabinoids impair all stages of memory including encoding, consolidation, and retrieval, and that cannabinoids increase intrusion errors with the inhaled and intravenous route and correspond to peak drug levels.
Cannabis use, cognitive performance and mood in a sample of workers
TLDR
Cannabis use was associated with impairment in both cognitive function and mood, though cannabis users reported no more workplace errors than controls, and users experienced working memory problems at the start, and psychomotor slowing and poorer episodic recall at the end of the working week.
Short-term memory impairment in cannabis-dependent adolescents.
TLDR
It is concluded that cannabis-dependent adolescents have selective short-term memory deficits that continue for at least 6 weeks after the last use of marijuana.
Specific attentional dysfunction in adults following early start of cannabis use
TLDR
The data suggest that beginning cannabis use during early adolescence may lead to enduring effects on specific attentional functions in adulthood, as apparently, vulnerable periods during brain development exist that are subject to persistent alterations by interfering exogenous cannabinoids.
Cognitive correlates of long-term cannabis use in Costa Rican men.
TLDR
Long-term cannabis use was associated with disruption of short-term memory, working memory, and attentional skills in older long-term Cannabis users.
Cognitive performance amongst recreational users of "ecstasy
TLDR
The present study provides additional evidence for long-term neuropsychological sequelae associated with the use of ecstasy, particularly with regard to delayed memory ability.
Understanding Drug Addiction: A Neuropsychological Perspective
TLDR
A neuropsychological model of addictive behaviour that highlights the complex interplay between cognition, brain maturation, psychopathology and drug exposure is presented.
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