Evidence map›Paper›PMID 21623657›Full record

ArticleTwin research and human genetics : the official journal of the International Society for Twin Studies2011

Twin-singleton differences in neonatal brain structure.

Rebecca C Knickmeyer, Chaeryon Kang, Sandra Woolson, J Keith Smith, Robert M Hamer, Weili Lin, Guido Gerig, Martin Styner, John H Gilmore

Registry-linked trialOpen access · bronzeAbstract readComparative StudyTwin Study
In one paragraph

Article in Twin research and human genetics : the official journal of the International Society for Twin Studies, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01409746 (Early Brain Development in Twins), which is not on this map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
2.2field-weighted citation impact, top 11% 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.

NCT01409746 completednot on this map

Early Brain Development in Twins

TypeobservationalSponsorUniversity of North Carolina, Chapel HillRan2004 to 2020Enrolled550ConditionsTwin Brain Development
3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 19 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Individual Variation of Human Cortical Structure Is Established in the First Year of Life.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2020
    Article
  5. Article
  6. Heritability of the limbic networks.Social cognitive and affective neuroscience · 2016
    Article
  7. Article
  8. Article
  9. Article
  10. Putting the 'epi' into epigenetics research in psychiatry.Journal of epidemiology and community health · 2013
    Article
  11. Article
  12. Early Postnatal Myelin Content Estimate of White Matter via T1w/T2w Ratio.Proceedings of SPIE--the International Society for Optical Engineering
    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

9 authors at 3 institutions in 1 country.

Rebecca C KnickmeyerDepartment of Psychiatry, University of North Carolina, United States of America. rebecca_knickmeyer@med.unc.edu
Chaeryon Kang
Sandra Woolson
J Keith Smith
Robert M Hamer
Weili Lin
Guido Gerig
Martin Styner
John H Gilmore
University of North Carolina at Charlotte · USUniversity of North Carolina at Chapel Hill · USUniversity of Utah · US

Funding

UNC MRDD Research CenterP30HD003110 · NICHD · UNIV OF NORTH CAROLINA CHAPEL HILL · PI REZNICK, JAMES · 1985 to 2012
$28.7M
Prospective study of the onset of schizophreniaP50MH064065 · NIMH · UNIV OF NORTH CAROLINA CHAPEL HILL · PI GILMORE, JOHN HORACE · 2002 to 2011
$19.6M
Early Brain Development in TwinsR01MH070890 · NIMH · UNIV OF NORTH CAROLINA CHAPEL HILL · PI GILMORE, JOHN HORACE · 2004 to 2014
$5.3M
Early Brain Development in TwinsU01MH070890 · NIMH · UNIV OF NORTH CAROLINA CHAPEL HILL · PI GILMORE, JOHN HORACE · 2015 to 2019
$2.9M
Developmental Brain Atlas Tools and Data Applied to Humans and MacaquesR01MH091645 · NIMH · UNIV OF NORTH CAROLINA CHAPEL HILL · PI NIETHAMMER, MARC, STYNER, MARTIN ANDREAS · 2010 to 2014
$2.1M
Sex Differences in Early Brain Development; Brain Development in Turner SyndromeK01MH083045 · NIMH · UNIV OF NORTH CAROLINA CHAPEL HILL · PI KNICKMEYER, REBECCA · 2008 to 2012
$764k
NICHD NIH HHS HD03110NICHD NIH HHS P30 HD003110NIMH NIH HHS K01 MH083045NIMH NIH HHS MH064065NIMH NIH HHS MH070890NIMH NIH HHS MH083045NIMH NIH HHS P50 MH064065NIMH NIH HHS R01 MH070890NIMH NIH HHS R01 MH091645NIMH NIH HHS U01 MH070890
6 · The paper itself

Abstract

Twin studies suggest that global and regional brain volumes are highly heritable. However, estimates of heritability vary across development. Given that all twin studies are open to the potential criticism of non-generalizability due to differences in intrauterine environment between twins and singletons, these age effects may reflect the influence of perinatal environmental factors, which are unique to twins and which may be especially evident early in life. To address this question, we compared brain volumes and the relationship of brain volumes to gestational age in 136 singletons (67 male, 69 female) and 154 twins (75 male, 79 female; 82 DZ, 72 MZ) who had received high resolution MRI scans of the brain in the first month of life. Intracranial volume, total white matter, and ventricle volumes did not differ between twins and singletons. However, cerebrospinal fluid and frontal white matter volume was greater in twins compared to singletons. While gray matter volumes at MRI did not differ between groups, the slope of the relationship between total and cortical gray matter and gestational age at the MRI scan was steeper in MZ twins compared to DZ twins. Post-hoc analyses suggested that gray matter development is delayed in MZ twins in utero and that they experience 'catch-up' growth in the first month of life. These differences should be taken into account when interpreting and designing studies in the early postnatal period.

Indexed as

BrainBrain MappingCross-Sectional StudiesFemaleHumansImage Processing, Computer-AssistedInfant, NewbornMagnetic Resonance ImagingMaleOrgan SizeTwins, DizygoticTwins, Monozygotic

Identifiers

PMID21623657
PMCPMC3145253
OpenAlexW2103928555

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

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.