Evidence map›Paper›PMID 26799151›Full record

ArticleMuscle & nerve2016

Cortical hyperexcitability in patients with C9ORF72 mutations: Relationship to phenotype.

Olivia Schanz, Devin Bageac, Laura Braun, Bryan J Traynor, Tanya J Lehky, Mary Kay Floeter

Abstract read
In one paragraph

Article in Muscle & nerve, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.8field-weighted citation impact, top 16% 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

23 citing papers in PubMed, 33 citations in OpenAlex.

  1. Trial
  2. Neuronal activity-dependent gene dysregulation inAmerican journal of physiology. Cell physiology · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Considerations for Amyotrophic Lateral Sclerosis (ALS) Clinical Trial Design.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2022
    Review
  8. Poly-dipeptides produced fromProceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  9. Breakdown of the central synapses in C9orf72-linked ALS/FTD.Frontiers in molecular neuroscience · 2022
    Review
  10. Review
  11. Article
  12. Review
  13. Review
  14. Article
  15. TheMolecular and cellular biology · 2018
    Article
  16. Review
  17. C9orf72 Dipeptide Repeats Cause Selective Neurodegeneration and Cell-Autonomous Excitotoxicity inThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2018
    Article
  18. Review
  19. Review
  20. Review
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 3 institutions in 1 country.

Olivia SchanzMotor Neuron Disorders Unit, National Institutes of Health, Bethesda, Maryland, USA.
Devin BageacMotor Neuron Disorders Unit, National Institutes of Health, Bethesda, Maryland, USA.
Laura BraunMotor Neuron Disorders Unit, National Institutes of Health, Bethesda, Maryland, USA.
Bryan J TraynorNeurogenetics of Neuromuscular Disease Section, National Institute of Aging, National Institutes of Health, Bethesda, Maryland, USA.
Tanya J LehkyEMG section, National Institute of Neurological Disorders, National Institutes of Health, Bethesda, Maryland, USA.
Mary Kay FloeterMotor Neuron Disorders Unit, National Institutes of Health, Bethesda, Maryland, USA.
National Institutes of Health · USNational Institute of Neurological Disorders and Stroke · USNational Institute on Aging · US

Funding

Natural history and biomarker discovery in C9orf72 Amyotrophic lateral sclerosis and frontotemporal dementiaZIANS003146 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI FLOETER, MARY KAY · 2015 to 2020
$6.6M
Spinal And Peripheral Mechanisms Of Human Motor ControlZ01NS002976 · NINDS · NEUROLOGICAL DISORDERS AND STROKE · PI FLOETER, MARY KAY · 1999 to 2008
$1.8M
Intramural NIH HHS Z01 NS002976Intramural NIH HHS ZIA NS003146
6 · The paper itself

Abstract

introductionPatients with mutations in C9orf72 can have amyotrophic lateral sclerosis (ALS), frontotemporal dementia (FTD), or ALS-FTD. The goals were to establish whether cortical hyperexcitability occurs in C9orf72 patients with different clinical presentations.

methodsCortical thresholds and silent periods were measured in thenar muscles in 19 participants with C9orf72 expansions and 21 healthy controls using transcranial magnetic stimulation (TMS). El Escorial and Rascovsky criteria were used to diagnose ALS and FTD. Fourteen participants with C9orf72 expansions were re-tested 6 months later. Correlations with finger-tapping speed, timed peg test, the ALS functional rating scale, and Dementia Rating Scale were examined.

resultsMost participants with C9orf72 expansions had normal or low cortical thresholds. Among them, ALS patients had the lowest thresholds and significantly shorter silent periods. Thresholds correlated with timed peg-test scores. TMS did not correlate with the Dementia Rating Scale.

conclusionsTMS measures of cortical excitability may serve as noninvasive biomarkers of ALS disease activity. Muscle Nerve, 2016 Muscle Nerve 54: 264-269, 2016.

Indexed as

AdultAmyotrophic Lateral SclerosisC9orf72 ProteinCerebral CortexElectromyographyEvoked Potentials, MotorFemaleFollow-Up StudiesFrontotemporal DementiaFunctional LateralityHumansMaleMiddle AgedMutationNeuropsychological TestsPhenotypeC9orf72 ProteinC9orf72 protein, humanProteinsALSamyotrophic lateral sclerosisC9orf72cortical hyperexcitabilitycortical silent periodfrontotemporal dementiatranscranial magnetic stimulation

Identifiers

PMID26799151
PMCPMC4940214
OpenAlexW2419624019

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.