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The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing
This study examined the influence of pre-stimulus alpha phase and attention on whether two visual stimuli occurring closely in time were perceived as simultaneous or asynchronous. The results demonstrated that certain phases of alpha in the period immediately preceding stimulus onset were associated...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Academic Press
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4907635/ https://www.ncbi.nlm.nih.gov/pubmed/26924284 http://dx.doi.org/10.1016/j.neuroimage.2016.02.065 |
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author | Milton, Alex Pleydell-Pearce, Christopher W. |
author_facet | Milton, Alex Pleydell-Pearce, Christopher W. |
author_sort | Milton, Alex |
collection | PubMed |
description | This study examined the influence of pre-stimulus alpha phase and attention on whether two visual stimuli occurring closely in time were perceived as simultaneous or asynchronous. The results demonstrated that certain phases of alpha in the period immediately preceding stimulus onset were associated with a higher proportion of stimuli judged to be asynchronous. Furthermore, this effect was shown to occur independently of both visuo-spatial attention and alpha amplitude. The findings are compatible with proposals that alpha phase reflects cyclic shifts in neuronal excitability. Importantly, however, the results further suggest that fluctuations in neuronal excitability can create a periodicity in neuronal transfer that can have functional consequences that are decoupled from changes in alpha amplitude. This study therefore provides evidence that perceptual processes fluctuate periodically although it remains uncertain whether this implies the discrete temporal framing of perception. |
format | Online Article Text |
id | pubmed-4907635 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Academic Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-49076352016-06-22 The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing Milton, Alex Pleydell-Pearce, Christopher W. Neuroimage Article This study examined the influence of pre-stimulus alpha phase and attention on whether two visual stimuli occurring closely in time were perceived as simultaneous or asynchronous. The results demonstrated that certain phases of alpha in the period immediately preceding stimulus onset were associated with a higher proportion of stimuli judged to be asynchronous. Furthermore, this effect was shown to occur independently of both visuo-spatial attention and alpha amplitude. The findings are compatible with proposals that alpha phase reflects cyclic shifts in neuronal excitability. Importantly, however, the results further suggest that fluctuations in neuronal excitability can create a periodicity in neuronal transfer that can have functional consequences that are decoupled from changes in alpha amplitude. This study therefore provides evidence that perceptual processes fluctuate periodically although it remains uncertain whether this implies the discrete temporal framing of perception. Academic Press 2016-06 /pmc/articles/PMC4907635/ /pubmed/26924284 http://dx.doi.org/10.1016/j.neuroimage.2016.02.065 Text en © 2016 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Milton, Alex Pleydell-Pearce, Christopher W. The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
title | The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
title_full | The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
title_fullStr | The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
title_full_unstemmed | The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
title_short | The phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
title_sort | phase of pre-stimulus alpha oscillations influences the visual perception of stimulus timing |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4907635/ https://www.ncbi.nlm.nih.gov/pubmed/26924284 http://dx.doi.org/10.1016/j.neuroimage.2016.02.065 |
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