Evidence map›Paper›PMID 35013268›Full record

ArticleNature communications2022

Imagined speech can be decoded from low- and cross-frequency intracranial EEG features.

Timothée Proix, Jaime Delgado Saa, Andy Christen, Stephanie Martin, Brian N Pasley, Robert T Knight, Xing Tian, David Poeppel, Werner K Doyle, Orrin Devinsky and 3 more

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 1 pooled it
20.1field-weighted citation impact, top 1% 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

58 citing papers in PubMed, 1 synthesis or guideline pooled it, 186 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Temporally structured motor and auditory representations in covert syllable production.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  17. Orbitofrontal High-Gamma Reflects Spike-Dissociable Value and Decision Mechanisms.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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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

13 authors at 6 institutions in 5 countries.

Timothée Proix *Department of Basic Neurosciences, Faculty of Medicine, University of Geneva, Geneva, Switzerland. timothee.proix@unige.ch.ORCID http://orcid.org/0000-0003-4750-9915
Jaime Delgado Saa *Department of Basic Neurosciences, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
Andy ChristenDepartment of Basic Neurosciences, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
Stephanie MartinDepartment of Basic Neurosciences, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
Brian N PasleyHelen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, USA.
Robert T KnightHelen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, USA.
Xing TianDivision of Arts and Sciences, New York University Shanghai, Shanghai, China.ORCID http://orcid.org/0000-0003-1629-6304
David PoeppelDepartment of Psychology, New York University, New York, NY, USA.
Werner K DoyleDepartment of Neurology, New York University Grossman School of Medicine, New York, NY, USA.
Orrin DevinskyDepartment of Neurology, New York University Grossman School of Medicine, New York, NY, USA.ORCID http://orcid.org/0000-0003-0044-4632
Luc H ArnalInstitut de l'Audition, Institut Pasteur, INSERM, F-75012, Paris, France.ORCID http://orcid.org/0000-0002-2226-6497
Pierre MégevandDepartment of Basic Neurosciences, Faculty of Medicine, University of Geneva, Geneva, Switzerland.ORCID http://orcid.org/0000-0002-0427-547X
Anne-Lise GiraudDepartment of Basic Neurosciences, Faculty of Medicine, University of Geneva, Geneva, Switzerland.ORCID http://orcid.org/0000-0002-1261-3555
University of Geneva · CHNew York University · USUniversity of California, Berkeley · USErnst Strüngmann Institute for Neuroscience · DEInserm · FRNew York University Shanghai · CN

Funding

Attention, Orientation and the Human Prefrontal CortexR01NS021135 · NINDS · UNIVERSITY OF CALIFORNIA DAVIS · PI Robert Thomas Knight · 1985 to 2026
$6.5M
NINDS NIH HHS R01 NS021135
6 · The paper itself

Abstract

Reconstructing intended speech from neural activity using brain-computer interfaces holds great promises for people with severe speech production deficits. While decoding overt speech has progressed, decoding imagined speech has met limited success, mainly because the associated neural signals are weak and variable compared to overt speech, hence difficult to decode by learning algorithms. We obtained three electrocorticography datasets from 13 patients, with electrodes implanted for epilepsy evaluation, who performed overt and imagined speech production tasks. Based on recent theories of speech neural processing, we extracted consistent and specific neural features usable for future brain computer interfaces, and assessed their performance to discriminate speech items in articulatory, phonetic, and vocalic representation spaces. While high-frequency activity provided the best signal for overt speech, both low- and higher-frequency power and local cross-frequency contributed to imagined speech decoding, in particular in phonetic and vocalic, i.e. perceptual, spaces. These findings show that low-frequency power and cross-frequency dynamics contain key information for imagined speech decoding.

Indexed as

Brain-Computer InterfacesElectrocorticographyLanguageSpeechAdultBrainBrain MappingElectrodesFemaleHumansImaginationMaleMiddle AgedPhoneticsYoung Adult

Identifiers

PMID35013268
PMCPMC8748882
OpenAlexW4205549622

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.