Objective: Alcohol and cannabis misuse are related to impaired cognition. When inferring causality, four nonexclusive theoretical models can account for this association: 1) a common underlying vulnerability model; 2) a neuroplasticity model in which impairment is concurrent with changes in substance use but temporary because of neuroplastic brain processes that restore function; 3) a neurotoxicity model of long-term impairment consequential to substance use; and 4) a developmental sensitivity hypothesis of age-specific effects. Using a developmentally sensitive design, the authors investigated relationships between year-to-year changes in substance use and cognitive development.
Methods: A population-based sample of 3,826 seventh-grade students from 31 schools consisting of 5% of all students entering high school in 2012 and 2013 in the Greater Montreal region were assessed annually for 4 years on alcohol and cannabis use, recall memory, perceptual reasoning, inhibition, and working memory, using school-based computerized assessments. Multilevel regression models, performed separately for each substance, were used to simultaneously test vulnerability (between-subject) and concurrent and lagged within-subject effects on each cognitive domain.
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The participant will describe how adolescent use of cannabis and alcohol may contribute to subsequent perturbed cognitive functioning.
This program is designed for all psychiatrists in clinical practice, residents in Graduate Medical Education programs, medical students interested in psychiatry, and other physicians who wish to advance their current knowledge of clinical medicine.
Estimated Time to Complete
Duration: 1 hour
Begin Date: February 1, 2019
End Date: January 31, 2021
How to Earn Credit
In order to earn CME credit, subscribers should read through the material presented in the article. After reading the article, complete the quiz and submit your evaluation and study hours (up to 1 AMA PRA Category 1 Credit™). A score of 60% or higher is required to receive credit.
Continuing Education Credit
The American Psychiatric Association (APA) is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide continuing medical education for physicians.
The APA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 Credit™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.
Faculty and Planner Disclosures
Title: A Population-Based Analysis of the Relationship Between Substance Use and Adolescent Cognitive Development
Authors: Jean-François G. Morin, B.A., Mohammad H. Afzali, Ph.D., Josiane Bourque, M.Sc., Sherry H. Stewart, Ph.D., Jean R. Séguin, Ph.D., Maeve O’Leary-Barrett, Ph.D., Patricia J. Conrod, Ph.D.
Affiliations: The Departments of Psychology and Psychiatry, University of Montreal, Montreal (J.-F.G.M., M.H.A., J.B., J.R.S., P.J.C.); Centre Hospitalier Universitaire Sainte-Justine, Montreal (M.O.L-B.); the Departments of Psychiatry, Psychology, and Community Health and Epidemiology, Dalhousie University, Halifax, Nova Scotia, Canada (S.H.S.).
Disclosures: The authors report no financial relationships with commercial interests.
Discussion of unapproved or investigational use of products*: No.
*APA policy requires disclosure by CME authors of unapproved or investigational use of products discussed in CME programs. Off-label use of medications by individual physicians is permitted and common. Decisions about off-label use can be guided by scientific literature and clinical experience.
Ned H. Kalin, M.D. (Editor-in-Chief, AJP); Michael D. Roy (Editorial Director, AJP); Michael A. Pogachar (Online Content Manager, Journals).
Dr. Kalin has received research support from NIH and NIMH; has served as a consultant for APA, CME Outfitters, the Pritzker Neuropsychiatric Disorders Research Consortium, the Skyland Trail Advisory Board, and TC MSO; owns stock in Celgene and Seattle Genetics; and received honoraria from Elsevier as co-editor of the journal Psychoneuroendocrinology. Mr. Roy and Mr. Pogachar report no financial relationships with commercial interests.
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