Brain-computer communication: Self-regulation of slow cortical potentials for verbal communication

Andrea Kubler, Nicola Neumann, Jochen Kaiser, Boris Kotchoubey, Thilo Hinterberger, Niels P. Birbaumer

Research output: Contribution to journalArticle

Abstract

Objective: To test a training procedure designed to enable severely paralyzed patients to communicate by means of self-regulation of slow cortical potentials. Design: Application of the Thought Translation Device to evaluate the procedure in patients with late-stage amyotrophic lateral sclerosis (ALS). Setting: Training sessions in the patients' homes. Participants: Two male patients with late-stage ALS. Interventions: Patients learned voluntary control of their slow cortical potentials by means of an interface between the brain and a computer. Training was based on visual feedback of slow cortical potentials shifts and operant learning principles. The learning process was divided into small steps of increasing difficulty. Main Outcome Measures: Accuracy of self-control of slow cortical potentials (percentage of correct responses). Learning progress calculated as a function of training session. Results: Within 3 to 8 weeks, both patients learned to self-regulate their slow cortical potentials and to use this skill to select letters or words in the Language Support Program. Conclusions: This training schedule is the first to enable severely paralyzed patients to communicate without any voluntary muscle control by using self-regulation of an electroencephalogram potential only. The protocol could be a model for training patients in other brain-computer interface techniques.

Original languageEnglish
Pages (from-to)1533-1539
Number of pages7
JournalArchives of Physical Medicine and Rehabilitation
Volume82
Issue number11
DOIs
Publication statusPublished - 2001

Keywords

  • Amyotrophic lateral sclerosis
  • Brain
  • Communication
  • Computers
  • Conditioning
  • Operant
  • Rehabilitation

ASJC Scopus subject areas

  • Rehabilitation

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