Evidence map›Paper›PMID 19114290›Full record

ArticleBrain and cognition2009

Lifespan changes in working memory in fragile X premutation males.

Kim M Cornish, Cary S Kogan, Lexin Li, Jeremy Turk, Sebastien Jacquemont, Randi J Hagerman

Open access · greenAbstract read
In one paragraph

Article in Brain and cognition, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed, 1 pooled it
5.3field-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

63 citing papers in PubMed, 1 synthesis or guideline pooled it, 103 citations in OpenAlex.

  1. Pooled it
  2. Cognitive dysfunction in women with theJournal of Alzheimer's disease : JAD · 2026
    Article
  3. Article
  4. Article
  5. Premutation Females with preFXTAS.International journal of molecular sciences · 2025
    Article
  6. Article
  7. Review
  8. Article
  9. Sensorimotor and inhibitory control in agingFrontiers in human neuroscience · 2023
    Article
  10. Article
  11. Review
  12. Article
  13. Women with Fragile X-associated Tremor/Ataxia Syndrome.Movement disorders clinical practice · 2020
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review

3 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 at 6 institutions in 4 countries.

Kim M CornishNeuroscience Laboratory for Research and Education in Developmental Disorders, McGill University, 3700 McTavish Street, Montreal, Que., Canada. kim.cornish@mcgill.ca
Cary S Kogan
Lexin Li
Jeremy Turk
Sebastien Jacquemont
Randi J Hagerman
Génétique Médicale & Génomique Fonctionelle · FRMcGill University · CANorth Carolina State University · USSt George's, University of London · GBUniversity of California, Davis · USUniversity of Ottawa · CA

Funding

GENOTYPE/PHENOTYPE RELATIONSHIPS IN FRAGILE X FAMILIESR01HD036071 · NICHD · UNIVERSITY OF CALIFORNIA DAVIS · PI PAUL J HAGERMAN, RANDI J. HAGERMAN · 1998 to 2026
$13.8M
NICHD NIH HHS R01 HD036071Wellcome Trust
6 · The paper itself

Abstract

Fragile X syndrome is the world's most common hereditary cause of developmental delay in males and is now well characterized at the biological, brain and cognitive levels. The disorder is caused by the silencing of a single gene on the X chromosome, the FMR1 gene. The premutation (carrier) status, however, is less well documented but has an emerging literature that highlights a more subtle profile of executive cognitive deficiencies that mirror those reported in fully affected males. Rarely, however, has the issue of age-related declines in cognitive performance in premutation males been addressed. In the present study, we focus specifically on the cognitive domain of working memory and its subcomponents (verbal, spatial and central executive memory) and explore performance across a broad sample of premutation males aged 18-69 years matched on age and IQ to unaffected comparison males. We further tease apart the premutation status into those males with symptoms of the newly identified neurodegenerative disorder, the fragile X-associated tremor/ataxia syndrome (FXTAS) and those males currently symptom-free. Our findings indicate a specific vulnerability in premutation males on tasks that require simultaneous manipulation and storage of new information, so-called executive control of memory. Furthermore, this vulnerability appears to exist regardless of the presence of FXTAS symptoms. Males with FXTAS symptoms demonstrated a more general impairment encompassing phonological working memory in addition to central executive working memory. Among asymptomatic premutation males, we observed the novel finding of a relationship between increased CGG repeat size and impairment to central executive working memory.

Indexed as

AgingHeterozygoteAdolescentAdultAgedFragile X Messenger Ribonucleoprotein 1Fragile X SyndromeHumansIntelligence TestsLinear ModelsMaleMemory, Short-TermMiddle AgedNeuropsychological TestsPrincipal Component AnalysisSurveys and QuestionnairesFMR1 protein, humanFragile X Messenger Ribonucleoprotein 1

Identifiers

PMID19114290
PMCPMC4158922
OpenAlexW2042795854

What OpenQuestion holds

Textmetadata
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.