A closed-loop brain computer interface to a virtual reality avatar: Gait adaptation to visual kinematic perturbations

Trieu Phat Luu, Yongtian He, Samuel Brown, Sho Nakagome, Jose L. Contreras-Vidal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Scopus citations

Abstract

The control of human bipedal locomotion is of great interest to the field of lower-body brain computer interfaces (BCIs) for rehabilitation of gait. While the feasibility of a closed-loop BCI system for the control of a lower body exoskeleton has been recently shown, multi-day closed-loop neural decoding of human gait in a virtual reality (BCI-VR) environment has yet to be demonstrated. In this study, we propose a real-time closed-loop BCI that decodes lower limb joint angles from scalp electroencephalography (EEC) during treadmill walking to control the walking movements of a virtual avatar. Moreover, virtual kinematic perturbations resulting in asymmetric walking gait patterns of the avatar were also introduced to investigate gait adaptation using the closed-loop BCI-VR system over a period of eight days. Our results demonstrate the feasibility of using a closed-loop BCI to learn to control a walking avatar under normal and altered visuomotor perturbations, which involved cortical adaptations. These findings have implications for the development of BCI-VR systems for gait rehabilitation after stroke and for understanding cortical plasticity induced by a closed-loop BCI system.

Original languageEnglish (US)
Title of host publication2015 International Conference on Virtual Rehabilitation, ICVR 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages30-37
Number of pages8
ISBN (Electronic)9781479989843
DOIs
StatePublished - Dec 16 2015
Event11th Annual International Conference on Virtual Rehabilitation, ICVR 2015 - Valencia, Spain
Duration: Jun 9 2015Jun 12 2015

Publication series

NameInternational Conference on Virtual Rehabilitation, ICVR
ISSN (Electronic)2331-9569

Other

Other11th Annual International Conference on Virtual Rehabilitation, ICVR 2015
CountrySpain
CityValencia
Period6/9/156/12/15

Keywords

  • Brain machine interface
  • gait adaptation
  • virtual environment
  • visuomotor adaptation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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