Evidence map›Paper›PMID 36347863›Full record

ArticleNature communications2022

Generalizable spelling using a speech neuroprosthesis in an individual with severe limb and vocal paralysis.

Sean L Metzger, Jessie R Liu, David A Moses, Maximilian E Dougherty, Margaret P Seaton, Kaylo T Littlejohn, Josh Chartier, Gopala K Anumanchipalli, Adelyn Tu-Chan, Karunesh Ganguly and 1 more

Registry-linked trialOpen 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. It is linked to trial NCT03698149 (A High-Performance ECoG-based Neural Interface for Communication and Neuroprosthetic Control), which is not on this map. Cited by 75 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed, 2 pooled it
15.3field-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.

NCT03698149 narecruitingnot on this map

A High-Performance ECoG-based Neural Interface for Communication and Neuroprosthetic Control

TypeinterventionalSponsorKarunesh GangulyRan2018 to 2030Enrolled3ConditionsALS, SCI - Spinal Cord Injury, Stroke, Multiple SclerosisArmsPMT/Blackrock Combination Device
3 · Its place in the literature

Who cites it

75 citing papers in PubMed, 2 syntheses or guidelines pooled it, 140 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Full-Stack Architectures for Intelligent Brain-Computer Interfaces.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Article

15 more citing papers are in PubMed but not listed here.

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

11 authors at 1 institution in 1 country.

Sean L Metzger *Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.ORCID 0000-0003-2379-6358
Jessie R Liu *Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.ORCID 0000-0001-9316-7624
David A Moses *Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.ORCID 0000-0002-5786-5334
Maximilian E DoughertyDepartment of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
Margaret P SeatonDepartment of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.ORCID 0000-0002-5655-7460
Kaylo T LittlejohnDepartment of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
Josh ChartierDepartment of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.ORCID 0000-0003-3626-7121
Gopala K AnumanchipalliDepartment of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
Adelyn Tu-ChanDepartment of Neurology, University of California, San Francisco, San Francisco, CA, USA.
Karunesh GangulyWeill Institute for Neuroscience, University of California, San Francisco, San Francisco, CA, USA.ORCID 0000-0002-2570-9943
Edward F ChangDepartment of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA. edward.chang@ucsf.edu.ORCID 0000-0003-2480-4700
University of California, San Francisco · US

Funding

A Pilot Clinical Trial for Speech NeuroprosthesisU01DC018671 · NIDCD · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI CHANG, EDWARD · 2021 to 2025
$5.6M
NIDCD NIH HHS U01 DC018671
6 · The paper itself

Abstract

Neuroprostheses have the potential to restore communication to people who cannot speak or type due to paralysis. However, it is unclear if silent attempts to speak can be used to control a communication neuroprosthesis. Here, we translated direct cortical signals in a clinical-trial participant (ClinicalTrials.gov; NCT03698149) with severe limb and vocal-tract paralysis into single letters to spell out full sentences in real time. We used deep-learning and language-modeling techniques to decode letter sequences as the participant attempted to silently spell using code words that represented the 26 English letters (e.g. "alpha" for "a"). We leveraged broad electrode coverage beyond speech-motor cortex to include supplemental control signals from hand cortex and complementary information from low- and high-frequency signal components to improve decoding accuracy. We decoded sentences using words from a 1,152-word vocabulary at a median character error rate of 6.13% and speed of 29.4 characters per minute. In offline simulations, we showed that our approach generalized to large vocabularies containing over 9,000 words (median character error rate of 8.23%). These results illustrate the clinical viability of a silently controlled speech neuroprosthesis to generate sentences from a large vocabulary through a spelling-based approach, complementing previous demonstrations of direct full-word decoding.

Indexed as

SpeechSpeech PerceptionHumansLanguageParalysisVocabulary

Identifiers

PMID36347863
PMCPMC9643551
OpenAlexW4308523455

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.