Evidence map›Paper›PMID 33778998›Full record

ArticleInternational journal of geriatric psychiatry2021

Neural correlates of the impulse dyscontrol domain of mild behavioral impairment.

Sascha Gill, Meng Wang, Pauline Mouches, Deepthi Rajashekar, Tolulope Sajobi, Frank P MacMaster, Eric E Smith, Nils D Forkert, Zahinoor Ismail, Alzheimer's Disease Neuroimaging Initiative

Open access · hybridAbstract read
In one paragraph

Article in International journal of geriatric psychiatry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 2 pooled it
8.6field-weighted citation impact, top 2% 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

43 citing papers in PubMed, 2 syntheses or guidelines pooled it, 79 citations in OpenAlex.

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  13. Salience network segregation mediates the effect of tau pathology on mild behavioral impairment.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
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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

10 authors at 2 institutions in 2 countries.

Sascha GillHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.ORCID 0000-0001-9978-8691
Meng WangHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Pauline MouchesHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Deepthi RajashekarHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Tolulope SajobiHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Frank P MacMasterHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Eric E SmithHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Nils D ForkertHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.ORCID 0000-0003-2556-3224
Zahinoor IsmailHotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.ORCID 0000-0002-5529-3731
Alzheimer's Disease Neuroimaging Initiative
University of Calgary · CAAlberta Health Services · CA

Funding

Alzheimer's Disease Neuroimaging Initiative - SupplementU01AG024904 · NIA · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI WEINER, MICHAEL W · 2004 to 2015
$121.0M
NIA NIH HHS U01 AG024904
6 · The paper itself

Abstract

objectivesAgitation and aggression are common in dementia and pre-dementia. The dementia risk syndrome mild behavioral impairment (MBI) includes these symptoms in the impulse dyscontrol domain. However, the neural circuitry associated with impulse dyscontrol in neurodegenerative disease is not well understood. The objective of this work was to investigate if regional micro- and macro-structural brain properties were associated with impulse dyscontrol symptoms in older adults with normal cognition, mild cognitive impairment, and Alzheimer's disease (AD).

methodsClinical, neuropsychiatric, and T1-weighted and diffusion-tensor magnetic resonance imaging (DTI) data from 80 individuals with and 123 individuals without impulse dyscontrol were obtained from the AD Neuroimaging Initiative. Linear mixed effect models were used to assess if impulse dyscontrol was related to regional DTI and volumetric parameters.

resultsImpulse dyscontrol was present in 17% of participants with NC, 43% with MCI, and 66% with AD. Impulse dyscontrol was associated with: (1) lower fractional anisotropy (FA), and greater mean, axial, and radial diffusivity in the fornix; (2) lesser FA and greater radial diffusivity in the superior fronto-occipital fasciculus; (3) greater axial diffusivity in the cingulum; (4) greater axial and radial diffusivity in the uncinate fasciculus; (5) gray matter atrophy, specifically, lower cortical thickness in the parahippocampal gyrus.

conclusionOur findings provide evidence that well-established atrophy patterns of AD are prominent in the presence of impulse dyscontrol, even when disease status is controlled for, and possibly in advance of dementia. Our findings support the growing evidence for impulse dyscontrol symptoms as an early manifestation of AD.

Indexed as

Alzheimer DiseaseCognitive DysfunctionNeurodegenerative DiseasesWhite MatterAgedAnisotropyBrainDiffusion Tensor ImagingHumansNeuropsychological TestsaggressionagitationAlzheimer's diseasegeriatric psychiatryimpulse dyscontrolmild behavioral impairment

Identifiers

PMID33778998
PMCPMC9292816
OpenAlexW3141137332

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.