Evidence map›Paper›PMID 29518573›Full record

ArticleNeuroImage2018

Protracted hippocampal development is associated with age-related improvements in memory during early childhood.

Tracy Riggins, Fengji Geng, Morgan Botdorf, Kelsey Canada, Lisa Cox, Gregory R Hancock

Abstract read
In one paragraph

Article in NeuroImage, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 3 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

68 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  11. Observational
  12. Associations Between Experience of Typical Variations in Stressors and Hippocampal Structure and Functional Connectivity in Childhood.International journal of developmental neuroscience : the official journal of the International Society for Developmental Neuroscience · 2025
    Article
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  15. Longitudinal hippocampal axis in large-scale cortical systems underlying development and episodic memory.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
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8 more citing papers are in PubMed but not listed here.

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

6 authors.

Tracy RigginsUniversity of Maryland, College Park, MD, United States. Electronic address: riggins@umd.edu.
Fengji GengUniversity of Maryland, College Park, MD, United States.
Morgan BotdorfUniversity of Maryland, College Park, MD, United States.
Kelsey CanadaUniversity of Maryland, College Park, MD, United States.
Lisa CoxUniversity of Maryland, College Park, MD, United States.
Gregory R HancockUniversity of Maryland, College Park, MD, United States.

Funding

Hippocampal-Memory Network Development and Episodic Memory in Early ChildhoodR01HD079518 · NICHD · UNIV OF MARYLAND, COLLEGE PARK · PI RIGGINS, TRACY L. · 2014 to 2018
$1.5M
NICHD NIH HHS R01 HD079518
6 · The paper itself

Abstract

The hippocampus is a structure that is critical for memory. Previous studies have shown that age-related differences in specialization along the longitudinal axis of this structure (i.e., subregions) and within its internal circuitry (i.e., subfields) relate to age-related improvements in memory in school-age children and adults. However, the influence of age on hippocampal development and its relations with memory ability earlier in life remains under-investigated. This study examined effects of age and sex on hippocampal subregion (i.e., head, body, tail) and subfield (i.e., subiculum, CA1, CA2-4/DG) volumes, and their relations with memory, using a large sample of 4- to 8-year-old children. Results examining hippocampal subregions suggest influences of both age and sex on the hippocampal head during early childhood. Results examining subfields within hippocampal head suggest these age effects may arise from CA1, whereas sex differences may arise from subiculum and CA2-4/DG. Memory ability was not associated with hippocampal subregion volume but was associated with subfield volume. Specifically, within the hippocampal head, relations between memory and CA1 were moderated by age; in younger children bigger was better, whereas in older children smaller was superior. Within the hippocampal body, smaller CA1 and larger CA2-4/DG contributed to better memory performance across all ages. Together, these results shed light on hippocampal development during early childhood and support claims that the prolonged developmental trajectory of the hippocampus contributes to memory development early in life.

Indexed as

AgingBrain MappingChildChild DevelopmentChild, PreschoolFemaleHippocampusHumansMagnetic Resonance ImagingMaleMemorySex CharacteristicsDevelopmentEarly childhoodHippocampusMemory

Identifiers

PMID29518573
PMCPMC5949262

What OpenQuestion holds

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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.