Evidence map›Paper›PMID 34034553›Full record

ArticleJournal of psychopharmacology (Oxford, England)2021

Altered cerebellar-cortical resting-state functional connectivity in cannabis users.

Ashley M Schnakenberg Martin, Dae-Jin Kim, Sharlene D Newman, Hu Cheng, William P Hetrick, Ken Mackie, Brian F O'Donnell

Abstract read
In one paragraph

Article in Journal of psychopharmacology (Oxford, England), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

  1. Altered reward-related resting-state network properties in adolescent cannabis use and depression.Progress in neuro-psychopharmacology & biological psychiatry · 2026
    Article
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  3. Observational
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ashley M Schnakenberg MartinDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.ORCID https://orcid.org/0000-0003-0320-3009
Dae-Jin KimDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.ORCID https://orcid.org/0000-0001-6664-0869
Sharlene D NewmanDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.ORCID https://orcid.org/0000-0002-5575-8535
Hu ChengDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.
William P HetrickDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.
Ken MackieDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.
Brian F O'DonnellDepartment of Psychological and Brain Sciences and Program in Neuroscience, Indiana University, Bloomington, IN, USA.

Funding

Cerebellar timing dysfunction in schizophreniaR01MH074983 · NIMH · TRUSTEES OF INDIANA UNIVERSITY · PI HETRICK, WILLIAM P · 2006 to 2016
$3.6M
INTEGRATIVE PREDOCTORAL TRAINING IN DRUG ABUSE RESEARCH AT INDIANA UNIVERSITYT32DA024628 · NIDA · TRUSTEES OF INDIANA UNIVERSITY · PI Andrea Grace Hohmann, Kenneth Mackie · 2008 to 2026
$3.1M
Cerebellar biobehavioral markers in cannabis usersR01DA048012 · NIDA · TRUSTEES OF INDIANA UNIVERSITY · PI HETRICK, WILLIAM P · 2019 to 2023
$2.7M
Graph Theoretic Analysis of Brain Networks in Cannabis UsersR21DA035493 · NIDA · TRUSTEES OF INDIANA UNIVERSITY · PI O'DONNELL, BRIAN FRANCIS · 2014 to 2015
$426k
NIDA NIH HHS R01 DA048012NIDA NIH HHS R21 DA035493NIDA NIH HHS T32 DA024628NIMH NIH HHS R01 MH074983
6 · The paper itself

Abstract

backgroundCannabis use has been associated with abnormalities in cerebellar mediated motor and non-motor (i.e. cognition and personality) phenomena. Since the cerebellum is a region with high cannabinoid type 1 receptor density, these impairments may reflect alterations of signaling between the cerebellum and other brain regions.

aimsWe hypothesized that cerebellar-cortical resting-state functional connectivity (rsFC) would be altered in cannabis users, relative to their non-using peers. It was also hypothesized that differences in rsFC would be associated with cannabis use features, such as age of initiation and lifetime use.

methodsCerebellar-cortical and subcortical rsFCs were computed between 28 cerebellar lobules, defined by a spatially unbiased atlas template of the cerebellum, and individual voxels in the cerebral regions, in 41 regular cannabis users (20 female) and healthy non-using peers (

resultsCannabis users demonstrated hyperconnectivity between the anterior cerebellar regions (i.e. lobule I-IV) with the posterior cingulate cortex, and hypoconnectivity between the rest of the cerebellum (i.e. Crus I and II, lobule VIIb, VIIIa, VIIIb, IX, and X) and the cortex. No associations were observed between features of cannabis use and rsFC.

conclusionsCannabis use was associated with altered patterns of rsFC from the cerebellum to the cerebral cortex which may have a downstream impact on behavior and cognition.

Indexed as

ConnectomeMarijuana UseAdolescentAdultCerebellumCerebral CortexFemaleHumansMagnetic Resonance ImagingMaleYoung AdultCannabiscerebellumconnectivityMRIposterior cingulate cortexresting-state

Identifiers

PMID34034553
PMCPMC8813046

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.