To close the eyes or not the effects of occipital alpha power induced by eye closure on auditory entrainment

Neuronal oscillations facilitate extracting sensory information from the environment through optimization of rhythmic fluctuation in excitation and inhibition cycles of neurons; which is defined as neural entrainment. Although research suggests entrainment to frequency modulated (FM) speech-like rhy...

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Main Author: Duman, Deniz
Other Authors: Humanistis-yhteiskuntatieteellinen tiedekunta, Faculty of Humanities and Social Sciences, Musiikin, taiteen ja kulttuurin tutkimuksen laitos, Department of Music, Art and Culture Studies, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:eng
Published: 2018
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/58659
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author Duman, Deniz
author2 Humanistis-yhteiskuntatieteellinen tiedekunta Faculty of Humanities and Social Sciences Musiikin, taiteen ja kulttuurin tutkimuksen laitos Department of Music, Art and Culture Studies Jyväskylän yliopisto University of Jyväskylä
author_facet Duman, Deniz Humanistis-yhteiskuntatieteellinen tiedekunta Faculty of Humanities and Social Sciences Musiikin, taiteen ja kulttuurin tutkimuksen laitos Department of Music, Art and Culture Studies Jyväskylän yliopisto University of Jyväskylä Duman, Deniz Humanistis-yhteiskuntatieteellinen tiedekunta Faculty of Humanities and Social Sciences Musiikin, taiteen ja kulttuurin tutkimuksen laitos Department of Music, Art and Culture Studies Jyväskylän yliopisto University of Jyväskylä
author_sort Duman, Deniz
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description Neuronal oscillations facilitate extracting sensory information from the environment through optimization of rhythmic fluctuation in excitation and inhibition cycles of neurons; which is defined as neural entrainment. Although research suggests entrainment to frequency modulated (FM) speech-like rhythmic sounds, factors influencing entrainment are still open for discovery. With this purpose, the current work tackled the understudied daily strategy, eye closure, in auditory perception domain. Neural and behavioral effects of eye closure on auditory entrainment were investigated. Eleven participants detected near-threshold gaps (sound breaks) embedded in 2.8 Hz FM stimuli both eyes open and closed conditions. Electroencephalogram (EEG) data were also obtained from eight of the participants. Eye closure was hypothesized to induce occipital alpha oscillations, associated with decreased neural and behavioral effects of entrainment and results in enhanced gap detection performance compared with eyes open condition. Results revealed that, as hypothesized, eye closure increased occipital alpha power. Moreover, increased 2.8 Hz neural activity and participants’ modulated behavioral gap detection performance suggested neural and behavioral auditory entrainment to 2.8 Hz FM sound stimuli both in eyes open and closed conditions. Contrary to the main hypothesis, closing the eyes did not influence the overall gap detection performance. However, first evidence of auditory entrainment under eye closure condition was provided. Although the current data have limitations, all in all, an interaction of two distinct auditory perception mechanisms -neural entrainment and cortical alpha band oscillations- are suggested to involve in perception of speech-like sound stimuli. Further, this interaction was proposed to influence auditory perception differently under eye open and closed periods, raising a firm background for further research on possible benefits of eye closure on sensory information processing.
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spellingShingle Duman, Deniz To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment Eye closure alpha power entrainment frequency modulated sound near-threshold gap detection Music, Mind and Technology (maisteriohjelma) Master's Degree Programme in Music, Mind and Technology 3054 kuulohavainnot EEG auditory perceptions
title To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment
title_full To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment
title_fullStr To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment
title_full_unstemmed To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment
title_short To close the eyes or not
title_sort to close the eyes or not the effects of occipital alpha power induced by eye closure on auditory entrainment
title_sub the effects of occipital alpha power induced by eye closure on auditory entrainment
title_txtP To close the eyes or not : the effects of occipital alpha power induced by eye closure on auditory entrainment
topic Eye closure alpha power entrainment frequency modulated sound near-threshold gap detection Music, Mind and Technology (maisteriohjelma) Master's Degree Programme in Music, Mind and Technology 3054 kuulohavainnot EEG auditory perceptions
topic_facet 3054 EEG Eye closure Master's Degree Programme in Music, Mind and Technology Music, Mind and Technology (maisteriohjelma) alpha power auditory perceptions entrainment frequency modulated sound kuulohavainnot near-threshold gap detection
url https://jyx.jyu.fi/handle/123456789/58659 http://www.urn.fi/URN:NBN:fi:jyu-201806203288
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