TOWARDS ANSWERING QUESTIONS IN DISORDERS OF CONSCIOUSNESS AND LOCKED-IN SYDROME WITH A SMR-BCI

Natalie Dayan, Alain Desire Bigirimana, Alison McCann, Jacqueline Stow, Jacinta McElligott, Damien Coyle

Research output: Contribution to conferencePaper

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Abstract

Sensorimotor rhythm-based brain-computer interfaces (SMR-BCI) may enable patients with prolonged disorders of consciousness (PDoC) or severe physical impairment to learn to intentionally modulate motor cortical neural oscillations. SMR-BCI could mitigate the need for movement-dependent behavioural responses, hence providing diagnostic information and/or communication strategies. Here, an SMR-BCI was evaluated in a three-staged protocol for PDoC. Stage I assessed awareness and capacity to modulate brain activity intentionally. Stage II facilitated SMR-BCI learning via stereo-auditory feedback training. Stage III tested use of SMR-BCI to answer closed categorized yes/no questions. Out of 14 patients with PDoC and locked in syndrome (LIS), eight patients showed capacity to modulate brain activity during stage I and thus participated in stage II. For practical reasons only five of these patients completed stage III. Two able-bodied participants were enrolled for benchmarking. Five of the eight participants performed significantly greater than chance level in 50-100% of runs (p<0.05). Average top run performance accuracy correlated with diagnoses category. Participants across the PDoC spectrum showed capacity to engage with SMR-BCI to answer closed questions.
Original languageEnglish
Number of pages7
Publication statusPublished - 20 Sep 2019
EventThe 8th Graz BCI Conference, 2019 - Institute of Neural Engineering, Graz University of Technology, Graz, Austria
Duration: 16 Sep 201920 Sep 2023
https://www.tugraz.at/institute/ine/graz-bci-conferences/8th-graz-bci-conference-2019/

Conference

ConferenceThe 8th Graz BCI Conference, 2019
CountryAustria
CityGraz
Period16/09/1920/09/23
Internet address

Keywords

  • EEG, BCI, Neurofeedback

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    Dayan, N., Bigirimana, A. D., McCann, A., Stow, J., McElligott, J., & Coyle, D. (2019). TOWARDS ANSWERING QUESTIONS IN DISORDERS OF CONSCIOUSNESS AND LOCKED-IN SYDROME WITH A SMR-BCI. Paper presented at The 8th Graz BCI Conference, 2019, Graz, Austria.