Evidence map›Paper›PMID 22305338›Full record

ArticleBrain research2012

Olfactory ERPs in an odor/visual congruency task differentiate ApoE ε4 carriers from non-carriers.

Joel Kowalewski, Claire Murphy

Abstract read
In one paragraph

Article in Brain research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Review
  2. Article
  3. Review
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. A designated odor-language integration system in the human brain.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2014
    Article
  10. Review
  11. Review
  12. 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

2 authors.

Joel KowalewskiSan Diego State University, USA.
Claire Murphy

Funding

VIRUS-INDUCED BRAIN PATHOLOGYP50AG005131 · NIA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BREWER, JAMES B · 1985 to 2018
$55.4M
Chemosensory Perception &Psychophysics in the AgedR01AG004085 · NIA · SAN DIEGO STATE UNIVERSITY · PI MURPHY, CLAIRE L · 1986 to 2015
$3.4M
OLFACTORY EVOKED POTENTIALS IN CLINICAL POPULATIONSR01DC002064 · NIDCD · SAN DIEGO STATE UNIVERSITY · PI MURPHY, CLAIRE L · 1994 to 2010
$2.7M
NIA NIH HHS P50 AG005131NIA NIH HHS R01 AG004085NIDCD NIH HHS R01 DC002064
6 · The paper itself

Abstract

Alzheimer's disease (AD) is a progressive, neurodegenerative disorder that impairs memory and semantic processing. AD patients and MCI patients at risk for AD show altered N400 ERP responses to incongruent visual and verbal stimuli. AD patients exhibit neuropathology in olfactory brain areas before cognitive symptoms, suggesting the potential for olfactory processing to reflect early pathology. Despite this, odor congruency has not been examined. We investigated odor-image congruency in older adults at genetic risk for AD. ApoE ε4 carriers and non-carriers were screened for anosmia, severe hyposmia, and dementia. Olfactory ERPs were measured 600-1300 ms following odor-image pairs. Odors were each presented once congruently and once incongruently via an olfactometer. Pz amplitude significantly decreased on incongruent trials in e4 carriers. Pz amplitude differences on congruous and incongruous trials were larger in non carriers. Regression indicated that congruency showed very high sensitivity and specificity for correctly classifying ε4 carriers from non-carriers.

Indexed as

Evoked PotentialsOdorantsOlfactory PerceptionSmellVisual PerceptionAgedAlzheimer DiseaseAnalysis of VarianceApolipoprotein E4FemaleGenetic Predisposition to DiseaseHumansMaleOlfaction DisordersSensitivity and SpecificityApolipoprotein E4

Identifiers

PMID22305338
PMCPMC3516391

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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.