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Altered cerebral blood flow and neurocognitive correlates in adolescent cannabis users.

Abstract：

RATIONALE:The effects of adolescent marijuana use on the developing brain remain unclear, despite its prevalence. Arterial spin labeling (ASL) is a noninvasive imaging technique that characterizes neurovascular status and cerebral blood flow (CBF), potentially revealing contributors to neuropathological alterations. No studies to date have looked at CBF in adolescent marijuana users. OBJECTIVES:This study examined CBF in adolescent marijuana users and matched healthy controls at baseline and after 4 weeks of monitored abstinence. METHODS:Heavy adolescent marijuana users (n = 23, >200 lifetime marijuana use days) and demographically matched controls (n = 23) with limited substance exposure underwent an ASL brain scan at an initial session and after 4 weeks of sequential urine toxicology to confirm abstinence. RESULTS:Marijuana users showed reduced CBF in four cortical regions including the left superior and middle temporal gyri, left insula, left and right medial frontal gyrus, and left supramarginal gyrus at baseline; users showed increased CBF in the right precuneus at baseline, as compared to controls (corrected p values < 0.05). No between group differences were found at follow-up. CONCLUSIONS:Marijuana use may influence CBF in otherwise healthy adolescents acutely; however, group differences were not observed after several weeks of abstinence. Neurovascular alterations may contribute to or underlie changes in brain activation, neuropsychological performance, and mood observed in young cannabis users with less than a month of abstinence.

journal_name

Psychopharmacology (Berl)

journal_title

Psychopharmacology

authors

Jacobus J,Goldenberg D,Wierenga CE,Tolentino NJ,Liu TT,Tapert SF

doi

10.1007/s00213-012-2674-4

subject

Has Abstract

pub_date

2012-08-01 00:00:00

pages

675-84

issue

4

eissn

0033-3158

issn

1432-2072

journal_volume

222

pub_type

杂志文章

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