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Updated: Jul 5, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study

Published on: August 18, 2020

Executive function deficits in short-term abstinent cannabis users.

Sue McHale¹, Nigel Hunt

¹Brain, Behaviour and Cognition Group, Sheffield Hallam University, UK. s.l.mchale@shu.ac.uk

Human Psychopharmacology

|April 19, 2008

Summary

Short-term cannabis abstinence impairs cognitive functions like verbal fluency and memory. These deficits highlight the impact of cannabis use on executive function, suggesting further research into long-term effects is needed.

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Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

Published on: February 6, 2019

Area of Science:

Neuroscience
Psychology

Background:

Cognitive deficits in abstinent chronic cannabis users are often subtle and difficult to detect with standard tasks.
Previous research indicates potential impacts of cannabis use on various cognitive domains.

Purpose of the Study:

To identify sensitive cognitive tasks for detecting performance decrements in abstinent chronic cannabis users.
To compare cognitive functions, including visual memory, verbal memory, and executive function, between cannabis users and control groups.

Main Methods:

Three experiments were conducted using short-term abstinent cannabis users.
Cognitive functions assessed included phonemic verbal fluency, visual recognition, immediate and delayed visual recall, and prospective memory.
Participants were recruited via snowball sampling and compared against standard and tobacco-use control groups.

Main Results:

Cannabis users exhibited deficits in verbal fluency, visual recognition, and delayed visual recall compared to both control groups.
Impairments were also observed in both short- and long-interval prospective memory tasks.
No significant differences were found in immediate visual recall between groups.

Conclusions:

Cannabis use is associated with impaired executive function.
The findings underscore the need for further investigation into the long-term consequences of cannabis consumption on cognitive abilities.