Open AccessAugmenting EEG-global-coherence with auditory and visual noise
Author(s) -
Ignacio Méndez-Balbuena,
Paulina Arrieta,
Nayeli Huidobro,
Amira Flores,
Rafael Lemuz López,
Carlos Trenado,
Elı́as Manjarrez
Publication year - 2018
Publication title -
medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.59
H-Index - 148
eISSN - 1536-5964
pISSN - 0025-7974
DOI - 10.1097/md.0000000000012008
Subject(s) - electroencephalography , noise (video) , coherence (philosophical gambling strategy) , functional magnetic resonance imaging , modality (human–computer interaction) , audiology , speech recognition , computer science , artificial intelligence , neuroscience , medicine , psychology , mathematics , statistics , image (mathematics)
The present investigation documents the electrophysiological occurrence of multisensory internal stochastic resonance (MISR) in the human electroencephalographic (EEG) coherence elicited by auditory and visual noise. We define MISR of EEG coherence as the phenomenon for which an intermediate level of input noise of a sensory modality enhances EEG coherence in response to another noisy sensory modality. Here, EEG coherence is computed by the global weighted coherence (GWC), modulated by quasi-Brownian noise. Specifically, we examined whether a particular level of auditory noise together with constant visual noise (experimental condition 1) and a specified level of visual noise together with constant auditory noise (experimental condition 2), improves EEG's GWC. We compared GWC between ongoing EEG basal activity (BA), zero noise (ZN), optimal noise (ON), and high noise (HN). The data disclosed an intermediate level of input noise that enhances the GWC for the majority of the subjects, thus demonstrating for the first time the occurrence of multisensory internal stochastic resonance (SR) in visuoauditory processing within the central nervous system.