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International Journal of Mental Health and Addiction

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01-08-2021 | Original Article

Working Overtime: Altered Functional Connectivity in Working Memory Following Regular Cannabis Use in Young Adults

Authors: Taylor Hatchard, Aziza Byron-Alhassan, Ola Mioduszewski, Katherine Holshausen, Stacey Correia, Allison Leeming, Gladys Ayson, Carley Chiasson, Peter Fried, Ian Cameron, Andra Smith

Published in: International Journal of Mental Health and Addiction | Issue 4/2021

Abstract

There is an emerging consensus that regular cannabis use may be detrimental to the developing brain, including potential long-lasting changes in executive functioning. Consequently, the present study examined neural activation and performance on a working memory n-back task using functional magnetic resonance imaging (fMRI) in a sample of young adults (ages 19 to 21) from a longitudinal research sample. Regular cannabis users (n = 10) were compared with non-regular cannabis user controls (n = 14) while completing the letter n-back task during fMRI. While there were no differences across performance indices, imaging parameters showed significant differences in brain activation during task performance. Specifically, there was evidence of increased activation in the left and right temporal lobes and the right superior frontal cortex in cannabis users, including significantly altered functional connectivity between these areas. Functional connectivity analyses also showed differences in expected patterns of connectivity in both working memory and reward circuitries among cannabis users, possibly reflecting compensatory mechanisms as a result of sustained use.

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Title: Working Overtime: Altered Functional Connectivity in Working Memory Following Regular Cannabis Use in Young Adults
Authors: Taylor Hatchard
Aziza Byron-Alhassan
Ola Mioduszewski
Katherine Holshausen
Stacey Correia
Allison Leeming
Gladys Ayson
Carley Chiasson
Peter Fried
Ian Cameron
Andra Smith
Publication date: 01-08-2021
Publisher: Springer US
Published in: International Journal of Mental Health and Addiction / Issue 4/2021
Print ISSN: 1557-1874
Electronic ISSN: 1557-1882
DOI: https://doi.org/10.1007/s11469-020-00226-y

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Working Overtime: Altered Functional Connectivity in Working Memory Following Regular Cannabis Use in Young Adults

Abstract

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Abstract

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