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Updated: Jul 6, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
07:30

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Published on: August 18, 2020

[Review: executive functioning and cannabis use].

Priscila Previato Almeida1, Maria Alice Fontes Pinto Novaes, Rodrigo Affonseca Bressan

  • 1Laboratório Interdisciplinar de Neurociências Clínicas, Departamento de Psiquiatria, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil. priscilapreviato@yahoo.co.br

Revista Brasileira De Psiquiatria (Sao Paulo, Brazil : 1999)
|April 1, 2008
PubMed
Summary

Cannabis use may impair executive functions like planning and impulse control, particularly with higher doses in non-severe users. Chronic users may show persistent deficits, but research requires more standardized methods.

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Area of Science:

  • Neuroscience
  • Psychology

Context:

  • Cannabis is the most prevalent illicit drug globally.
  • Cognitive deficits linked to cannabis use are under-researched.
  • Executive functions are crucial for managing substance dependence.

Purpose:

  • To review the consequences of cannabis use on executive functioning.
  • To synthesize findings on cognitive deficits associated with cannabis consumption.

Summary:

  • Acute cannabis use, especially high doses of tetrahydrocannabinol, can impair planning and impulse control in non-severe users.
  • Chronic cannabis users do not consistently exhibit these acute impairments.
  • Residual executive functioning deficits in chronic users are debated, but may persist in some after 28 days of abstinence.

Impact:

  • Current neuropsychological studies often lack a primary focus on executive functioning evaluation.
  • Improved study designs, standardized tests, and neuroimaging are needed to clarify cannabis neurotoxicity.
  • Understanding these cognitive impacts is vital for addressing substance dependence and informing public health strategies.