Augmenting EEG-global-coherence with auditory and visual noise

Méndez-Balbuena, Ignacio; Arrieta, Paulina; Huidobro, Nayeli; Flores, Amira; López, Rafael Lemuz; Trenado, Carlos; Manjarrez, Elı́as

doi:10.1097/md.0000000000012008

Cited by 10 publications

(8 citation statements)

References 34 publications

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“…We conclude that the global coherence in EEG signals can be augmented not only by multisensory integration of noise sources as previously reported (Mendez-Balbuena et al 2018) but also by binaural or monaural noise sources via the internal SR phenomenon.…”

Section: Discussionsupporting

confidence: 84%

“…Internal SR in the brain is a phenomenon in which the coherence between two neural signals is enhanced by the application of an intermediate level of sensory noise. Recently, Mendez-Balbuena et al (2018) showed that the application of an intermediate level of auditory noise during the sensory perception of visual noise produces an augmented response in the Global Weighted Coherence (GWC) in EEG signals. This finding suggests the presence of internal SR due to multisensory interactions.…”

Section: Introductionmentioning

confidence: 99%

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Augmenting Global Coherence in EEG Signals with Binaural or Monaural Noises

et al. 2020

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Internal stochastic resonance (internal SR) is a phenomenon of non-linear systems in which the addition of a non-zero level of noise produces an enhancement in the coherence between two or more signals. In a previous study, we found that the simultaneous administration of multisensory visual and auditory noise augments global coherence in electroencephalographic (EEG) signals via this phenomenon. Here, we examined whether such global coherence can also be augmented with at least one noisy acoustic source. We performed experiments on healthy subjects and applied the following binaural and monaural noise-stimulation protocols. First, we administered to the left ear Gaussian noise of fixed intensity, while we delivered to the right ear a second Gaussian noise of variable intensity levels (binaural protocol). Second, we applied the Gaussian noise of the same variable intensity levels but only to one ear (monaural protocol). We performed a permutation test analysis, finding that during both noise protocols there was a significant enhancement in the global coherence in EEG signals via the occurrence of internal SR within central pathways of the auditory system.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Augmenting Global Coherence in EEG Signals with Binaural or Monaural Noises

et al. 2020

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“…In addition, the sensory evidence itself might be corrupted by varying amounts of noise. Interestingly, in a phenomenon referred to as cross-modal stochastic resonance, it has been found that intermediate levels of noise in one sensory modality can enhance (rather than impair) responses to weak stimuli in another sensory modality (Manjarrez et al, 2007; Mendez-Balbuena et al, 2018). Future studies should address how learned priors and sensory context interact with bottom-up sensory evidence in the brain.…”

Section: Future Directionsmentioning

confidence: 99%

The Ventriloquist Illusion as a Tool to Study Multisensory Processing: An Update

Bruns

2019

Front. Integr. Neurosci.

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Ventriloquism, the illusion that a voice appears to come from the moving mouth of a puppet rather than from the actual speaker, is one of the classic examples of multisensory processing. In the laboratory, this illusion can be reliably induced by presenting simple meaningless audiovisual stimuli with a spatial discrepancy between the auditory and visual components. Typically, the perceived location of the sound source is biased toward the location of the visual stimulus (the ventriloquism effect). The strength of the visual bias reflects the relative reliability of the visual and auditory inputs as well as prior expectations that the two stimuli originated from the same source. In addition to the ventriloquist illusion, exposure to spatially discrepant audiovisual stimuli results in a subsequent recalibration of unisensory auditory localization (the ventriloquism aftereffect). In the past years, the ventriloquism effect and aftereffect have seen a resurgence as an experimental tool to elucidate basic mechanisms of multisensory integration and learning. For example, recent studies have: (a) revealed top-down influences from the reward and motor systems on cross-modal binding; (b) dissociated recalibration processes operating at different time scales; and (c) identified brain networks involved in the neuronal computations underlying multisensory integration and learning. This mini review article provides a brief overview of established experimental paradigms to measure the ventriloquism effect and aftereffect before summarizing these pathbreaking new advancements. Finally, it is pointed out how the ventriloquism effect and aftereffect could be utilized to address some of the current open questions in the field of multisensory research.

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“…Emerging evidence suggests that high internal neuronal noise and poor external noise filtering impact auditory perception in individuals with ASD (Park et al, 2017). Recent research has implemented new measurement methods using EEG global coherence to examine the relationship between internal neuronal noise and the application of external auditory quasi-Brownian noise vs. absence of external noise (Mendez-Balbuena et al, 2018). Few studies have examined the relationship between EDA and EEG.…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Noise-Attenuating Headphones on Physiological Responses for Children With Autism Spectrum Disorders

Pfeiffer

Duker

Murphy

et al. 2019

Front. Integr. Neurosci.

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Objective: The purpose of this study was to evaluate the proof of concept of an intervention to decrease sympathetic activation as measured by skin conductivity (electrodermal activity, EDA) in children with an autism spectrum disorder (ASD) and auditory hypersensitivity (hyperacusis). In addition, researchers examined if the intervention provided protection against the negative effects of decibel level of environmental noises on electrodermal measures between interventions. The feasibility of implementation and outcome measures within natural environments were evaluated.Method: A single-subject multi-treatment design was used with six children, aged 8–16 years, with a form of Autism (i.e., Autism, PDD-NOS). Participants used in-ear (IE) and over-ear (OE) headphones for two randomly sequenced treatment phases. Each child completed four phases: (1) a week of baseline data collection; (2) a week of an intervention; (3) a week of no intervention; and (4) a week of the other intervention. Empatica E4 wristbands collected EDA data. Data was collected on 16–20 occasions per participant, with five measurements per phase.Results: Separated tests for paired study phases suggested that regardless of intervention type, noise attenuating headphones led to a significance difference in both skin conductance levels (SCL) and frequency of non-specific conductance responses (NS-SCRs) between the baseline measurement and subsequent phases. Overall, SCL and NS-SCR frequency significantly decreased between baseline and the first intervention phase. A protective effect of the intervention was tested by collapsing intervention results into three phases. Slope correlation suggested constant SCL and NS-SCR frequency after initial use of the headphones regardless of the increase in environmental noises. A subsequent analysis of the quality of EDA data identified that later phases of data collection were associated with better data quality.Conclusion: Many children with ASD have hypersensitivities to sound resulting in high levels of sympathetic nervous system reactivity, which is associated with problematic behaviors and distress. The findings of this study suggest that the use of noise attenuating headphones for individuals with ASD and hyperacusis may reduce sympathetic activation. Additionally, results suggest that the use of wearable sensors to collect physiological data in natural environments is feasible with established protocols and training procedures.

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Augmenting EEG-global-coherence with auditory and visual noise

Cited by 10 publications

References 34 publications

Augmenting Global Coherence in EEG Signals with Binaural or Monaural Noises

Augmenting Global Coherence in EEG Signals with Binaural or Monaural Noises

The Ventriloquist Illusion as a Tool to Study Multisensory Processing: An Update

Effectiveness of Noise-Attenuating Headphones on Physiological Responses for Children With Autism Spectrum Disorders

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