Evidence map›Paper›PMID 32304186›Full record

ArticleAnnals of clinical and translational neurology2020

Cortical hyperexcitability evolves with disease progression in ALS.

Parvathi Menon, Mana Higashihara, Mehdi van den Bos, Nimeshan Geevasinga, Matthew C Kiernan, Steve Vucic

Open access · goldAbstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 3 pooled it
4.0field-weighted citation impact, top 5% 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

47 citing papers in PubMed, 3 syntheses or guidelines pooled it, 88 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Facial onset sensory and motor neuronopathy (FOSMN syndrome): Cases series and systematic review.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2023
    Pooled it
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  9. Article
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  11. Clinical utility and prospective of TMS-EEG: Updated review from an international expert group.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2026
    Review
  12. Article
  13. Review
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  15. Article
  16. Article
  17. Neuronal activity-dependent gene dysregulation inAmerican journal of physiology. Cell physiology · 2025
    Article
  18. Article
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  20. 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

6 authors at 1 institution in 1 country.

Parvathi MenonWestmead Clinical School, University of Sydney, Sydney, NSW, Australia.ORCID 0000-0001-6935-5852
Mana HigashiharaWestmead Clinical School, University of Sydney, Sydney, NSW, Australia.
Mehdi van den BosWestmead Clinical School, University of Sydney, Sydney, NSW, Australia.
Nimeshan GeevasingaWestmead Clinical School, University of Sydney, Sydney, NSW, Australia.
Matthew C KiernanBrain and Mind Center, University of Sydney, Sydney, NSW, Australia.ORCID 0000-0001-9054-026X
Steve VucicWestmead Clinical School, University of Sydney, Sydney, NSW, Australia.ORCID 0000-0002-8323-873X
The University of Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveCortical hyperexcitability has been established as an early feature of amyotrophic lateral sclerosis (ALS). The evolution of cortical hyperexcitability with ALS progression remains to be fully elucidated. This study aims to investigate changes in cortical function in ALS with disease progression.

methodsCortical function assessed by threshold tracking transcranial magnetic stimulation (TMS) along with clinical phenotyping was prospectively undertaken on 444 patients presenting with suspected ALS (345 ALS; 99 neuromuscular mimics). Disease stage was defined as follows: (1) King's clinical staging system and (2) proportion of disease duration statistically categorized into tertials.

resultsCortical hyperexcitability was evident across all ALS stages, being more prominent in later stages of ALS as indicated by increased motor-evoked potential amplitude (P < 0.05), as well as longer disease duration as reflected by reduced short-interval intracortical inhibition (P < 0.05). Prolonged central motor conduction time was evident with disease progression. These changes were accompanied by reduction in neurophysiological index (P < 0.001) and compound muscle action potential amplitude (P < 0.01), progressive muscle weakness (P < 0.001), and decline in the ALS functional rating scale (P < 0.001).

interpretationThis study established an increase in cortical hyperexcitability with increased disease duration in ALS, mediated by cortical disinhibition and direct increase in corticomotoneuronal excitability.

Indexed as

Disease ProgressionAgedAmyotrophic Lateral SclerosisCerebral CortexEvoked Potentials, MotorFemaleHumansMaleMiddle AgedMotor NeuronsMuscle WeaknessNeural ConductionNeural InhibitionProspective StudiesSeverity of Illness IndexTranscranial Magnetic Stimulation

Identifiers

PMID32304186
PMCPMC7261748
OpenAlexW3016447694

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.