Evidence map›Paper›PMID 23001254›Full record

Trial reportPsychopharmacology2013

Memory-related hippocampal functioning in ecstasy and amphetamine users: a prospective fMRI study.

Benjamin Becker, Daniel Wagner, Philip Koester, Katja Bender, Christoph Kabbasch, Euphrosyne Gouzoulis-Mayfrank, Jörg Daumann

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Psychopharmacology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
–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

12 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Decision-making in polydrug amphetamine-type stimulant users: an fMRI study.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2013
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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.

Benjamin BeckerDepartment of Psychiatry and Psychotherapy, University of Cologne, Kerpener Strasse 62, 50924 Cologne, Germany. ben_becker@gmx.de
Daniel Wagner
Philip Koester
Katja Bender
Christoph Kabbasch
Euphrosyne Gouzoulis-Mayfrank
Jörg Daumann

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

rationaleRecreational use of ecstasy (3,4-methylenedioxymethamphetamine [MDMA]) has been associated with memory impairments. Functional neuroimaging studies with cross-sectional designs reported altered memory-related hippocampal functioning in ecstasy-polydrug users. However, differences might be pre-existing or related to the concomitant use of amphetamine.

objectiveTo prospectively investigate the specific effects of ecstasy on memory-related hippocampal functioning.

methodsWe used an associative memory task and functional magnetic resonance imaging (fMRI) in 40 ecstasy and/or amphetamine users at baseline (t1) and after 12 months (t2). At t1, all subjects had very limited amphetamine and/or ecstasy experience (less than 5 units lifetime dose). Based on the reported drug use at t2, subjects with continued ecstasy and/or amphetamine use (n = 17) were compared to subjects who stopped use after t1 (n = 12).

resultsAnalysis of repeated measures revealed that encoding-related activity in the left parahippocampal gyrus changed differentially between the groups. Activity in this region increased in abstinent subjects from t1 to t2, however, decreased in subjects with continued use. Decreases within the left parahippocampal gyrus were associated with the use of ecstasy, but not amphetamine, during the follow-up period. However, there were no significant differences in memory performance.

conclusionsThe current findings suggest specific effects of ecstasy use on memory-related hippocampal functioning. However, alternative explanations such as (sub-)acute cannabis effects are conceivable.

Indexed as

Drug UsersMagnetic Resonance ImagingAdolescentAdultAmphetamineFemaleFollow-Up StudiesHippocampusHumansMaleMemoryN-Methyl-3,4-methylenedioxyamphetamineProspective StudiesYoung AdultAmphetamineN-Methyl-3,4-methylenedioxyamphetamine

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.