Evidence map›Paper›PMID 1479398›Full record

ArticleJournal of neurology, neurosurgery, and psychiatry1992

A study of regional cerebral blood flow and cognitive performance in Alzheimer's disease.

J T O'Brien, S Eagger, G M Syed, B J Sahakian, R Levy

Abstract read
In one paragraph

Article in Journal of neurology, neurosurgery, and psychiatry, 1992. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing 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

37 citing papers in PubMed.

  1. Trial
  2. A comparison of qEEG and HMPAO-SPECT in relation to the clinical severity of Alzheimer's disease.European archives of psychiatry and clinical neuroscience · 1997
    Trial
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  18. Ion channel networks in the control of cerebral blood flow.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2016
    Review
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  20. Article
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

5 authors.

J T O'BrienSection of Old Age Psychiatry, Institute of Psychiatry, London, UK.
S Eagger
G M Syed
B J Sahakian
R Levy

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Thirty five patients with dementia of the Alzheimer type (DAT) and 35 controls matched for age, sex and handedness were investigated using single photon emission computer tomography (SPECT) with 99m technetium HMPAO. Regional cerebral blood flow (rCBF) was assessed semi-quantitatively in 18 cortical and 4 subcortical areas by normalising mean information density in each region to cerebellar mean information density. Analysis revealed significantly reduced rCBF to temporal, parietal, frontal and left occipital cortex in the patients whilst blood flow to subcortical areas showed no differences between the 2 groups. In addition, significant left-sided cortical hypoperfusion was seen in the DAT group but not in controls. When patients were sub-divided on the basis of disease severity, those with mild disease showed temporal, parietal and left frontal changes with more severely affected patients also showing right frontal and left occipital involvement. rCBF patterns did not distinguish between presenile and senile onset cases once duration and severity of illness were controlled. Eight cortical areas were also rated visually for perfusion deficits on a simple 4 point scale. Perfusion deficits were detected in 34 of 35 patients but in only 4 of 35 controls. In the DAT group significant correlations were found between many of the neuropsychological tests used and rCBF. Memory correlated with left temporal activity, praxis, perception, object assembly and block design with right parietal activity and language with activity throughout the left hemisphere. Significant correlations were also seen between subcortical and cortical blood flow, possibly explaining the correlations observed between many of the neuropsychological tests and thalamic blood flow.

Indexed as

Tomography, Emission-Computed, Single-PhotonAgedAlzheimer DiseaseBrainBrain MappingCerebral CortexCognition DisordersDominance, CerebralFemaleHumansMaleMiddle AgedNeuropsychological TestsOrganotechnetium CompoundsOximesRegional Blood FlowOrganotechnetium CompoundsOximesTechnetium Tc 99m Exametazime

Identifiers

PMID1479398
PMCPMC1015336

What OpenQuestion holds

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Read underepoch 390

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.