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Publication
Comparison of visual and auditory modalities for Upper-Alpha EEG-Neurofeedback
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Advisor(s)
Abstract(s)
Electroencephalography (EEG) neurofeedback
(NF) training has been shown to produce long-lasting effects on
the improvement of cognitive function as well as the
normalization of aberrant brain activity in disease. However,
the impact of the sensory modality used as the NF
reinforcement signal on training effectiveness has not been
systematically investigated. In this work, an EEG-based NF training system was developed targeting the individual upper alpha (UA) band and using either a visual or an auditory
reinforcement signal, so as to compare the effects of the two
sensory modalities. Sixteen healthy volunteers were randomly
assigned to the Visual or Auditory group, where a radius varying sphere or a volume-varying sound, respectively,
reflected the relative amplitude of UA measured at EEG
electrode Cz. Each participant underwent a total of four NF
sessions, of approximately 40 min each, on consecutive days.
Both groups showed significant increases in UA at Cz within
sessions, and also across sessions. Effects subsequent to NF
training were also found beyond the target frequency UA and
scalp location Cz, namely in the lower-alpha and theta bands
and in posterior brain regions, respectively. Only small
differences were found on the EEG between the Visual and
Auditory groups, suggesting that auditory reinforcement
signals may be as effective as the more commonly used visual
signals. The use of auditory NF may potentiate training
protocols conducted under mobile conditions, which are now
possible due to the increasing availability of wireless EEG
systems.
Description
Keywords
Electroencephalography (EEG) neurofeedback (NF) training Upper-Alpha EEG-Neurofeedback . Faculdade de Ciências Exatas e da Engenharia
Citation
Bucho, T., Caetano, G., Vourvopoulos, A., Accoto, F., Esteves, I., Bermúdez i Badia, S. ., ... & Figueiredo, P. (2019, July). Comparison of visual and auditory modalities for Upper-Alpha EEG-Neurofeedback. In 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (pp. 5960-5966). IEEE.
Publisher
IEEE