Trial reportScientific reports2021
TMS-EEG signatures of glutamatergic neurotransmission in human cortex.
Trial report in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 6 of them syntheses that pooled 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.
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.
Who cites it
65 citing papers in PubMed, 6 syntheses or guidelines pooled it, 132 citations in OpenAlex.
- Methodological Choices Matter: A Systematic Comparison of TMS-EEG Studies Targeting the Primary Motor Cortex.Human brain mapping · 2024Pooled it
- Pooled it
- Transcranial magnetic stimulation therapy for central post-stroke pain: systematic review and meta-analysis.Frontiers in neuroscience · 2024Pooled it
- Transcranial magnetic stimulation-evoked electroencephalography responses as biomarkers for epilepsy: A review of study design and outcomes.Human brain mapping · 2023Pooled it
- Resting and TMS-EEG markers of treatment response in major depressive disorder: A systematic review.Frontiers in human neuroscience · 2022Pooled it
- Pharmacological adjuncts and transcranial magnetic stimulation-induced synaptic plasticity: a systematic review.Journal of psychiatry & neuroscience : JPNPooled it
- Sustained pharmacodynamic effects of S-ketamine on cortical excitability and resting-state brain activity: A randomized, placebo-controlled trial.British journal of clinical pharmacology · 2026Trial
- Laser acupuncture improves cortical excitability and behavioural performance in healthy individuals: a randomized controlled trial.BMC complementary medicine and therapies · 2026Trial
- Distinct impacts of sodium channel blockers on the strength-duration properties of human motor cortex neurons.Epilepsia · 2025Trial
- Transcranial magnetic stimulation as biomarker of excitability in drug development: A randomized, double-blind, placebo-controlled, cross-over study.British journal of clinical pharmacology · 2022Trial
- Mechanisms of transcranial magnetic brain stimulation.Physiological reviews · 2026Review
- From Oscillations to Brain States: Real-Time EEG-TMS for Adaptive Neuromodulation.Bioengineering (Basel, Switzerland) · 2026Review
- Transcranial Magnetic Stimulation Combined With Electroencephalography Analysis Suggest Time-Dependent and Region-Specific Modulation of Cortical Excitability During Acute Alcohol Intoxication.Alcohol, clinical & experimental research · 2026Article
- Effects of pharmacological modulation of cortical excitability on resting-state EEG PAC in humans.Scientific reports · 2026Article
- 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 · 2026Review
- Psychedelic Modulation of Excitation/Inhibition Balance: A Dual-Phase Neurodevelopmental Model.ACS chemical neuroscience · 2026Review
- The impact of Independent Component Analysis on TMS-evoked potentials: a within-subject comparison across motor and prefrontal areas.Clinical neurophysiology practice · 2026Article
- TMS-EEG signatures of motor network dysfunction in multiple sclerosis.Brain communications · 2026Article
- Mills-Nithi algorithm for navigated transcranial magnetic stimulation motor mapping in healthy subjects and brain tumor patients.Clinical neurophysiology practice · 2026Article
- Brain Oscillatory Modes as a Proxy of Stroke Recovery.Neurorehabilitation and neural repair · 2025Article
5 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 5 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Neuronal activity in the brain reflects an excitation-inhibition balance that is regulated predominantly by glutamatergic and GABAergic neurotransmission, and often disturbed in neuropsychiatric disorders. Here, we tested the effects of a single oral dose of two anti-glutamatergic drugs (dextromethorphan, an NMDA receptor antagonist; perampanel, an AMPA receptor antagonist) and an L-type voltage-gated calcium channel blocker (nimodipine) on transcranial magnetic stimulation (TMS)-evoked electroencephalographic (EEG) potentials (TEPs) and TMS-induced oscillations (TIOs) in 16 healthy adults in a pseudorandomized, double-blinded, placebo-controlled crossover design. Single-pulse TMS was delivered to the hand area of left primary motor cortex. Dextromethorphan increased the amplitude of the N45 TEP, while it had no effect on TIOs. Perampanel reduced the amplitude of the P60 TEP in the non-stimulated hemisphere, and increased TIOs in the beta-frequency band in the stimulated sensorimotor cortex, and in the alpha-frequency band in midline parietal channels. Nimodipine and placebo had no effect on TEPs and TIOs. The TEP results extend previous pharmaco-TMS-EEG studies by demonstrating that the N45 is regulated by a balance of GABAAergic inhibition and NMDA receptor-mediated glutamatergic excitation. In contrast, AMPA receptor-mediated glutamatergic neurotransmission contributes to propagated activity reflected in the P60 potential and midline parietal induced oscillations. This pharmacological characterization of TMS-EEG responses will be informative for interpreting TMS-EEG abnormalities in neuropsychiatric disorders with pathological excitation-inhibition balance.
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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.