Extracting multiple commands from a single SSVEP flicker using eye-accommodation

• Autorzy: Sharma Kamal , Kar Soumitra

Identyfikatory

DOI

10.1016/j.bbe.2019.08.002

• Języki publikacji: EN

Abstrakty

EN

The steady-state visually evoked potential (SSVEP) based brain-computer interfaces (BCIs) generally deploy flickering stimuli with different frequencies in order to generate different commands. This paper presents a setup that can be used to generate multiple commands from a single flickering stimulus using magnitude modulation of SSVEP through eye-accommodation. In this setup, a flickering stimulus was shown on the computer screen and a passive fixation target was placed between the screen and the subject. The eye-accommodation mechanism to focus on the target between the screen and the subject, caused the flickering stimulus to become blurred which reduced the magnitude of the evoked SSVEP response. The reduced magnitude SSVEP response can be used to generate another command over the command generated when the subject focuses directly on the stimulus. The fixation target was placed at 3 different positions that can provide up to 4 commands from the single flicker stimulus. Fifteen healthy human subjects participated in the experiments. The mean offline accuracies obtained for 2-class, 3-class, and 4-class extraction were 100%, 94.2 ± 6.1%, and 80.9 ± 9.7% respectively for a 4-seconds time window.

Słowa kluczowe

EN

SSVEP; brain-computer interface; SSVEP magnitude modulation; eye accomodation

PL

SSVEP; interfejs mózg-komputer; akomodacja oka

• Wydawca: Nałęcz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences ; Elsevier
• Czasopismo: Biocybernetics and Biomedical Engineering
• Rocznik: 2019
• Tom: Vol. 39, no. 3
• Strony: 914--922
• Opis fizyczny: Bibliogr. 35 poz., rys., tab., wykr.

Twórcy

autor

Sharma Kamal

• New DRHR Building, Bhabha Atomic Research Centre, Mumbai 400085, India

autor

Kar Soumitra

• Homi Bhabha National Institute, India

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).