Evidence map›Paper›PMID 34479168›Full record

ArticleNeurobiology of aging2021

Higher motor cortical excitability linked to greater cognitive dysfunction in Alzheimer's disease: results from two independent cohorts.

Siddhesh Zadey, Stephanie S Buss, Katherine McDonald, Daniel Z Press, Alvaro Pascual-Leone, Peter J Fried

Open access · greenAbstract read
In one paragraph

Article in Neurobiology of aging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 3 pooled it
1.7field-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

22 citing papers in PubMed, 3 syntheses or guidelines pooled it, 23 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 3 countries.

Siddhesh ZadeyBerenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Indian Institute of Science Education and Research, Pune, India; Duke Global Health Institute, Duke University, Durham, NC, USA; Association for Socially Applicable Research (ASAR), Pune, India.
Stephanie S BussBerenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Department of Neurology, Harvard Medical School, Boston, MA, USA.
Katherine McDonaldBerenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Center for Cognitive and Brain Health, Northeastern University, Boston, MA, USA.
Daniel Z PressBerenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
Alvaro Pascual-LeoneDepartment of Neurology, Harvard Medical School, Boston, MA, USA; Guttmann Brain Health Institute, Institut Guttmann de Neurorehabilitació, Universitat Autonoma de Barcelona, Badalona, Spain; Hinda and Arthur Marcus Institute for Aging Research, Center for Memory Health, Hebrew Senior Life, Harvard Medical School, Boston, Massachusetts, USA. Electronic address: apleone@hsl.harvard.edu.
Peter J FriedBerenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA. Electronic address: pfried@bidmc.harvard.edu.
Beth Israel Deaconess Medical Center · USNortheastern University · USUniversitat Autònoma de Barcelona · ES

Funding

HARVARD CLINICAL AND TRANSLATIONAL SCIENCE CENTER (UL1)UL1RR025758 · NCRR · HARVARD MEDICAL SCHOOL · PI NADLER, LEE MARSHALL · 2008 to 2011
$91.4M
Transcranial Direct Current Stimulation and Robotic Training in Chronic StrokeR01HD069776 · NICHD · WINIFRED MASTERSON BURKE MED RES INST · PI EDWARDS, DYLAN JAMES · 2012 to 2016
$3.2M
Multifocal transcranial current stimulation for cognitive and motor dysfunction in dementiaR01AG076708 · NIA · HEBREW REHABILITATION CENTER FOR AGED · PI MANOR, BRADLEY D., PASCUAL-LEONE, ALVARO · 2022 to 2024
$2.3M
Cortical connectivity, physiology, and response to stimulation in human epilepsyR01NS073601 · NINDS · BETH ISRAEL DEACONESS MEDICAL CENTER · PI CHANG, BERNARD S. · 2011 to 2015
$1.9M
Boston Children's Hospital and Beth Israel Deaconess Medical Center NeuroNEXT Clinical Research SiteU24NS107183 · NINDS · BOSTON CHILDREN'S HOSPITAL · PI DARRAS, BASIL T, FRANK, SAMUEL ARTHUR · 2018 to 2022
$1.8M
Role of functional brain connectivity on efficacy of TMS for depressionR21MH099196 · NIMH · BETH ISRAEL DEACONESS MEDICAL CENTER · PI PASCUAL-LEONE, ALVARO · 2013 to 2014
$491k
Cortical plasticity in type II diabetes mellitusR21NS082870 · NINDS · BETH ISRAEL DEACONESS MEDICAL CENTER · PI PASCUAL-LEONE, ALVARO · 2013 to 2014
$490k
Brain Plasticity Measures in MCIR21AG051846 · NIA · BETH ISRAEL DEACONESS MEDICAL CENTER · PI PASCUAL-LEONE, ALVARO · 2016 to 2017
$476k
Transcranial Stimulation in Spino-Cerebellar AtaxiaR21NS085491 · NINDS · BETH ISRAEL DEACONESS MEDICAL CENTER · PI PASCUAL-LEONE, ALVARO · 2013 to 2014
$469k
NCRR NIH HHS UL1 RR025758NIA NIH HHS R01 AG076708NIA NIH HHS R21 AG051846NICHD NIH HHS R01 HD069776NIMH NIH HHS R21 MH099196NINDS NIH HHS R01 NS073601NINDS NIH HHS R21 NS082870NINDS NIH HHS R21 NS085491NINDS NIH HHS U24 NS107183
6 · The paper itself

Abstract

Prior studies have reported increased cortical excitability in people with Alzheimer's disease (AD), but findings have been inconsistent, and how excitability relates to dementia severity remains incompletely understood. The objective of this study was to investigate the association between a transcranial magnetic stimulation (TMS) measure of motor cortical excitability and measures of cognition in AD. A retrospective cross-sectional analysis tested the relationship between resting motor threshold (RMT) and the Alzheimer's Disease Assessment Scale - Cognitive Subscale (ADAS-Cog) across two independent samples of AD participants (a discovery cohort, n=22 and a larger validation cohort, n=129) and a control cohort of cognitively normal adults (n=26). RMT was correlated with ADAS-Cog in the discovery-AD cohort (n=22, β=-.70, p<0.001) but not in the control cohort (n=26, β=-0.13, p=0.513). This relationship was confirmed in the validation-AD cohort (n=129, β=-.35, p<0.001). RMT can be a useful neurophysiological marker of progressive global cognitive dysfunction in AD. Future translational research should focus on the potential of RMT to predict and track individual pathophysiological trajectories of aging.

Indexed as

CognitionCortical ExcitabilityAgedAlzheimer DiseaseCognitive DysfunctionCross-Sectional StudiesFemaleHumansMaleMiddle AgedMotor CortexNeuropsychological TestsRetrospective StudiesTranscranial Magnetic StimulationAlzheimer's Disease Assessment Scale – Cognitive SubscaleCognitive dysfunctionCortical excitabilityDementiaHyperexcitabilityNeurophysiological markerResting motor thresholdTranscranial magnetic stimulation

Identifiers

PMID34479168
PMCPMC8616846
OpenAlexW3176976775

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.