Evidence map›Paper›PMID 35713198›Full record

ArticleAnnals of neurology2022

Decreased Frontal Gamma Activity in Alzheimer Disease Patients.

Elias P Casula, Maria C Pellicciari, Sonia Bonnì, Ilaria Borghi, Michele Maiella, Martina Assogna, Marilena Minei, Caterina Motta, Alessia D'Acunto, Francesco Porrazzini and 9 more

Registry-linked trialOpen access · hybridAbstract read
In one paragraph

Article in Annals of neurology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06826261 (Home-based Transcranial Electrical Stimulation), which is not on this map. Cited by 45 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 1 pooled it
8.0field-weighted citation impact, top 2% 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.

NCT06826261 naactive not recruitingnot on this mapstarted 2023, after this paper: background citation

Home-based Transcranial Electrical Stimulation (tES) in Alzheimer's Disease

TypeinterventionalSponsorI.R.C.C.S. Fondazione Santa LuciaRan2023 to 2025Enrolled30ConditionsAlzheimer DiseaseArmstranscranial alternating current stimulation, sham transcranial alternating current stimulation
3 · Its place in the literature

Who cites it

45 citing papers in PubMed, 1 synthesis or guideline pooled it, 74 citations in OpenAlex.

  1. Pooled it
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  5. 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
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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

19 authors at 6 institutions in 2 countries.

Elias P Casula *Experimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.ORCID 0000-0002-5039-973X
Maria C Pellicciari *Experimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Sonia BonnìExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Ilaria BorghiExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Michele MaiellaExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Martina AssognaExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Marilena MineiExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Caterina MottaExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Alessia D'AcuntoExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Francesco PorrazziniExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Valentina PezzopaneExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Lucia MencarelliExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Andrea RoncaioliExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Lorenzo RocchiDepartment of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy.
Danny A SpampinatoExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Carlo CaltagironeExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.
Emiliano SantarnecchiGordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Alessandro MartoranaMemory Clinic, Department of Systems Medicine, University of Tor Vergata, Rome, Italy.
Giacomo KochExperimental Neuropsychophysiology Laboratory, Department of Behavioral and Clinical Neurology, Santa Lucia Foundation, Scientific Institute for Research and Health Care, Rome, Italy.ORCID 0000-0001-6155-9439
Fondazione Santa Lucia · ITUniversity of Ferrara · ITUniversity of Rome Tor Vergata · ITHarvard University · USItalian Institute of Technology · ITUniversity of Cagliari · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveIn Alzheimer disease (AD) animal models, synaptic dysfunction has recently been linked to a disorder of high-frequency neuronal activity. In patients, a clear relation between AD and oscillatory activity remains elusive. Here, we attempt to shed light on this relation by using a novel approach combining transcranial magnetic stimulation and electroencephalography (TMS-EEG) to probe oscillatory activity in specific hubs of the frontoparietal network in a sample of 60 mild-to-moderate AD patients.

methodsSixty mild-to-moderate AD patients and 21 age-matched healthy volunteers (HVs) underwent 3 TMS-EEG sessions to assess cortical oscillations over the left dorsolateral prefrontal cortex, the precuneus, and the left posterior parietal cortex. To investigate the relations between oscillatory activity, cortical plasticity, and cognitive decline, AD patients underwent a TMS-based neurophysiological characterization and a cognitive evaluation at baseline. The latter was repeated after 24 weeks to monitor clinical evolution.

resultsAD patients showed a significant reduction of frontal gamma activity as compared to age-matched HVs. In addition, AD patients with a more prominent decrease of frontal gamma activity showed a stronger impairment of long-term potentiation-like plasticity and a more pronounced cognitive decline at subsequent follow-up evaluation at 24 weeks.

interpretationOur data provide novel evidence that frontal lobe gamma activity is dampened in AD patients. The current results point to the TMS-EEG approach as a promising technique to measure individual frontal gamma activity in patients with AD. This index could represent a useful biomarker to predict disease progression and to evaluate response to novel pharmacological therapies. ANN NEUROL 2022;92:464-475.

Indexed as

Alzheimer DiseaseCognitive DysfunctionAnimalsElectroencephalographyFrontal LobeHumansTranscranial Magnetic Stimulation

Identifiers

PMID35713198
PMCPMC9543336
OpenAlexW4283026476

What OpenQuestion holds

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Registered trials

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.