Evidence map›Paper›PMID 31136968›Full record

ArticleNeuroImage. Clinical2019

Reduced hippocampal subfield volumes and memory function in school-aged children born preterm with very low birthweight (VLBW).

Synne Aanes, Knut Jørgen Bjuland, Kam Sripada, Anne Elisabeth Sølsnes, Kristine H Grunewaldt, Asta Håberg, Gro C Løhaugen, Jon Skranes

Open access · goldAbstract read
In one paragraph

Article in NeuroImage. Clinical, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
6.6field-weighted citation impact, top 4% 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

19 citing papers in PubMed, 32 citations in OpenAlex.

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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 at 3 institutions in 1 country.

Synne AanesDepartment of Clinical and Molecular Medicine, Norwegian University of Science & Technology, Trondheim, Norway. Electronic address: synne.aanes@gmail.com.
Knut Jørgen BjulandDepartment of Research, Sørlandet Hospital HF, Norway.
Kam SripadaDepartment of Clinical and Molecular Medicine, Norwegian University of Science & Technology, Trondheim, Norway.
Anne Elisabeth SølsnesDepartment of Clinical and Molecular Medicine, Norwegian University of Science & Technology, Trondheim, Norway.
Kristine H GrunewaldtDepartment of Clinical and Molecular Medicine, Norwegian University of Science & Technology, Trondheim, Norway; Department of Pediatrics, St Olav University Hospital, Trondheim, Norway.
Asta HåbergDepartment of Neuromedicine and Movement Science, Norwegian University of Science & Technology, Trondheim, Norway.
Gro C LøhaugenDepartment of Pediatrics, Sørlandet Hospital, Arendal, Norway.
Jon SkranesDepartment of Clinical and Molecular Medicine, Norwegian University of Science & Technology, Trondheim, Norway; Department of Pediatrics, Sørlandet Hospital, Arendal, Norway.
Norwegian University of Science and Technology · NOSørlandet Hospital Arendal · NOSørlandet Sykehus · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe hippocampus, an essential structure for learning and memory, has a reduced volume in preterm born (gestational age < 37 weeks) individuals with very low birth weight (VLBW: birth weight < 1500 g), which may affect memory function. However, the hippocampus is a complex structure with distinct subfields related to specific memory functions. These subfields are differentially affected by a variety of neuropathological conditions, but it remains unclear how these subfields may be affected by medical complications following preterm birth which may cause aberrant brain development, and the consequences of this on learning and memory function in children with VLBW.

methodsChildren born preterm with VLBW (n = 34) and term-born controls from the Norwegian Mother and Child Cohort Study (MoBa) (n = 104) underwent structural MRI and a neuropsychological assessment of memory function at primary school age. FreeSurfer 6.0 was used to analyze the volumes of hippocampal subfields which were compared between groups, as was memory performance. Correlations between abnormal hippocampal subfields and memory performance were explored in the VLBW group.

resultsAll absolute hippocampal subfield volumes were lower in the children with VLBW compared to MoBa term-born controls, and the volumes of the left and right dentate gyrus and the right subiculum remained significantly lower after correcting for total intracranial volume. The VLBW group had inferior working memory performance and the score on the subtest Spatial Span backwards was positively correlated to the volume of the right dentate gyrus.

conclusionsHippocampal subfield volumes seem to be differently affected by early brain development related to preterm birth. The dentate gyrus appears particularly susceptible to adverse effects of preterm birth. Reduced working memory function among children with VLBW was associated with smaller volume of right dentate gyrus. This finding demonstrates alterations in hippocampal structure-function relationships associated with early brain development related to preterm birth.

Indexed as

ChildFemaleHippocampusHumansInfant, NewbornInfant, PrematureInfant, Very Low Birth WeightMagnetic Resonance ImagingMaleMemoryRisk FactorsHippocampal subfieldsHippocampusMemory functionNorwegian Mother and Child Cohort Study (MoBa)Preterm birthStructural MRIVery low birth weight

Identifiers

PMID31136968
PMCPMC6536855
OpenAlexW2944688196

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.