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Can the occipital alpha-phase speed up visual detection through a real-time EEG-based brain-computer interface (BCI)?

  • Authors
  • Vigué-Guix, Irene; Morís Fernández, Luis; Torralba Cuello, Mireia; Ruzzoli, Manuela; Soto-Faraco, Salvador
  • UPF authors
  • RUZZOLI, MANUELA; TORRALBA CUELLO, MIREIA; MORIS FERNANDEZ, LUIS; SOTO FARACO, SALVADOR;
  • Type
  • Articles de recerca
  • Journal títle
  • The European Journal of Neuroscience
  • Publication year
  • 2020
  • Pages
  • 0-0
  • ISSN
  • 0953-816X
  • Publication State
  • Publicat
  • Abstract
  • Electrical brain oscillations reflect fluctuations in neural excitability. Fluctuations in the alpha band (¿, 8-12 Hz) in the occipito-parietal cortex are thought to regulate sensory responses, leading to cyclic variations in visual perception. Inspired by this theory, some past and recent studies have addressed the relationship between ¿-phase from extra-cranial EEG and behavioural responses to visual stimuli in humans. The latest studies have used offline approaches to confirm ¿-gated cyclic patterns. However, a particularly relevant implication is the possibility to use this principle online for real-time neurotechnology, whereby stimuli are time-locked to specific ¿-phases leading to predictable outcomes in performance. Here we aimed at providing a proof-of-concept for such real-time neurotechnology. Participants performed a speeded response task to visual targets that were presented upon a real-time estimation of the ¿-phase via an EEG closed-loop brain-computer interface (BCI). We predicted, according to the theory, a modulation of reaction times (RTs) along the ¿-cycle. Our BCI system achieved reliable trial-to-trial phase-locking of stimuli to the phase of individual occipito-parietal ¿-oscillations. Yet, the behavioural results did not support a consistent relation between RTs and the phase of the ¿-cycle neither at group nor single participant levels. We must conclude that although the ¿-phase might play a role in perceptual decisions from a theoretical perspective, its impact on EEG-based BCI application appears negligible.
  • Complete citation
  • Vigué-Guix, Irene; Morís Fernández, Luis; Torralba Cuello, Mireia; Ruzzoli, Manuela; Soto-Faraco, Salvador. Can the occipital alpha-phase speed up visual detection through a real-time EEG-based brain-computer interface (BCI)?. The European Journal of Neuroscience 2020; ( ).
Bibliometric indicators
  • 3 times cited Scopus
  • 3 times cited WOS
  • Índex Scimago de 1.376 (2019)