Evidence map›Paper›PMID 26936688›Full record

ArticleHuman brain mapping2016

White matter microstructure and impulsivity in methamphetamine dependence with and without a history of psychosis.

Anne Uhlmann, Jean-Paul Fouche, Katharina Lederer, Ernesta M Meintjes, Don Wilson, Dan J Stein

Open access · bronzeAbstract read
In one paragraph

Article in Human brain mapping, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 2 pooled it
3.1field-weighted citation impact, top 9% of its field
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

20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 36 citations in OpenAlex.

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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

6 authors at 1 institution in 1 country.

Anne UhlmannDepartment of Psychiatry and Mental Health, University of Cape Town, South Africa.
Jean-Paul FoucheDepartment of Psychiatry and Mental Health, University of Cape Town, South Africa.
Katharina LedererDepartment of Psychiatry and Mental Health, University of Cape Town, South Africa.
Ernesta M MeintjesDepartment of Human Biology, University of Cape Town, MRC/UCT Medical Imaging Research Unit, South Africa.
Don WilsonDepartment of Psychiatry and Mental Health, University of Cape Town, South Africa.
Dan J SteinDepartment of Psychiatry and Mental Health, University of Cape Town, South Africa.
University of Cape Town · ZA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMethamphetamine (MA) use may lead to white matter injury and to a range of behavioral problems and psychiatric disorders, including psychosis. The present study sought to assess white matter microstructural impairment as well as impulsive behavior in MA dependence and MA-associated psychosis (MAP).

methodsThirty patients with a history of MAP, 39 participants with MA dependence and 40 healthy controls underwent diffusion tensor imaging (DTI). Participants also completed the UPPS-P impulsive behavior questionnaire. We applied tract-based spatial statistics (TBSS) to investigate group differences in mean diffusivity (MD), fractional anisotropy (FA), axial (λ‖ ) and radial diffusivity (λ⊥ ), and their association with impulsivity scores and psychotic symptoms.

resultsThe MAP group displayed widespread higher MD, λ‖ and λ⊥ levels compared to both controls and the MA group, and lower FA in extensive white matter areas relative to controls. MD levels correlated positively with negative psychotic symptoms in MAP. No significant DTI group differences were found between the MA group and controls. Both clinical groups showed high levels of impulsivity, and this dysfunction was associated with DTI measures in frontal white matter tracts.

conclusionsMAP patients show distinct patterns of impaired white matter integrity of global nature relative to controls and the MA group. Future work to investigate the precise nature and timing of alterations in MAP is needed. The results are further suggestive of frontal white matter pathology playing a role in impulsivity in MA dependence and MAP. Hum Brain Mapp 37:2055-2067, 2016. © 2016 Wiley Periodicals, Inc.

Indexed as

Impulsive BehaviorAdolescentAdultAmphetamine-Related DisordersBrainCentral Nervous System StimulantsDiffusion Tensor ImagingFemaleFollow-Up StudiesHumansImage Processing, Computer-AssistedMaleMethamphetaminePattern Recognition, AutomatedPsychiatric Status Rating ScalesPsychoses, Substance-InducedCentral Nervous System StimulantsMethamphetamineanisotropybraindiffusion tensor imagingdiffusivityimpulsive behaviorpsychostimulantpsychotic disordersTBSS

Identifiers

PMID26936688
PMCPMC6867545
OpenAlexW2296287322

What OpenQuestion holds

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Registered trials

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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.