Evidence map›Paper›PMID 26899787›Full record

ArticleNeuroImage2016

Magnetic susceptibility of brain iron is associated with childhood spatial IQ.

Kimberly L H Carpenter, Wei Li, Hongjiang Wei, Bing Wu, Xue Xiao, Chunlei Liu, Gordon Worley, Helen Link Egger

Abstract read
In one paragraph

Article in NeuroImage, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 2 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

35 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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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

8 authors.

Kimberly L H CarpenterDepartment of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA. Electronic address: kimberly.carpenter@dm.duke.edu.
Wei LiResearch Imaging Institute, University of Texas Health Science Center, San Antonio, TX, USA; Department of Ophthalmology, University of Texas Health Science Center, San Antonio, TX, USA; Brain Imaging and Analysis Center, Duke University School of Medicine, Durham, NC, USA.
Hongjiang WeiBrain Imaging and Analysis Center, Duke University School of Medicine, Durham, NC, USA.
Bing WuBrain Imaging and Analysis Center, Duke University School of Medicine, Durham, NC, USA; GE Healthcare, Beijing, China.
Xue XiaoBrain Imaging and Analysis Center, Duke University School of Medicine, Durham, NC, USA; Department of Biomedical Engineering, Tsinghua University, Beijing, China.
Chunlei LiuBrain Imaging and Analysis Center, Duke University School of Medicine, Durham, NC, USA; Department of Radiology, Duke University School of Medicine, Durham, NC, USA.
Gordon WorleyProgram in Neurodevelopmental Disabilities, Division of Pediatric Neurology, Department of Pediatrics, Duke University School of Medicine, Durham, NC, USA.
Helen Link EggerDepartment of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, USA.

Funding

Longitudinal Functional Imaging of Early Childhood Anxiety DisordersR01MH081025 · NIMH · DUKE UNIVERSITY · PI EGGER, HELEN L. · 2008 to 2012
$3.1M
Ultra-Resolution Imaging of Brain Circuitry and its Development in Mental HealthR01MH096979 · NIMH · UNIVERSITY OF CALIFORNIA BERKELEY · PI LIU, CHUNLEI · 2013 to 2017
$1.8M
Susceptibility MRI as a marker for diagnosis and clinical disability in MSR01NS079653 · NINDS · DUKE UNIVERSITY · PI LIU, CHUNLEI · 2014 to 2015
$460k
NIMH NIH HHS R01 MH081025NIMH NIH HHS R01 MH096979NINDS NIH HHS R01 NS079653
6 · The paper itself

Abstract

Iron is an essential micronutrient for healthy brain function and development. Because of the importance of iron in the brain, iron deficiency results in widespread and lasting effects on behavior and cognition. We measured iron in the basal ganglia of young children using a novel MRI method, quantitative susceptibility mapping, and examined the association of brain iron with age and cognitive performance. Participants were a community sample of 39 young children recruited from pediatric primary care who were participating in a 5-year longitudinal study of child brain development and anxiety disorders. The children were ages 7 to 11years old (mean age: 9.5years old) at the time of the quantitative susceptibility mapping scan. The differential abilities scale was administered when the children were 6years old to provide a measure of general intelligence and verbal (receptive and expressive), non-verbal, and spatial performance. Magnetic susceptibility values, which are linearly related to iron concentration in iron-rich areas, were extracted from regions of interest within iron-rich deep gray matter nuclei from the basal ganglia, including the caudate, putamen, substantia nigra, globus pallidus, and thalamus. Controlling for scan age, there was a significant positive association between iron in the basal ganglia and spatial IQ, with this effect being driven by iron in the right caudate We also replicated previous findings of a significant positive association between iron in the bilateral basal ganglia and age. Our finding of a positive association between spatial IQ and mean iron in the basal ganglia, and in the caudate specifically, suggests that iron content in specific regions of the iron-rich deep nuclei of the basal ganglia influences spatial intelligence. This provides a potential neurobiological mechanism linking deficits in spatial abilities reported in children who were severely iron deficient as infants to decreased iron within the caudate.

Indexed as

Brain ChemistryIntelligenceBasal GangliaBrainBrain MappingChildFemaleHumansIntelligence TestsIronMagnetic PhenomenaMagnetic Resonance ImagingMaleNeuropsychological TestsIronBrain ironCaudateQuantitative susceptibility mappingSpatial intelligence

Identifiers

PMID26899787
PMCPMC4851899

What OpenQuestion holds

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LicenceTDM
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.