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Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation
Neural processing of dynamic continuous visual input, and cognitive influences thereon, are frequently studied in paradigms employing strictly rhythmic stimulation. However, the temporal structure of natural stimuli is hardly ever fully rhythmic but possesses certain spectral bandwidths (e.g. lip mo...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Academic Press
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5312821/ https://www.ncbi.nlm.nih.gov/pubmed/27867090 http://dx.doi.org/10.1016/j.neuroimage.2016.11.043 |
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author | Keitel, Christian Thut, Gregor Gross, Joachim |
author_facet | Keitel, Christian Thut, Gregor Gross, Joachim |
author_sort | Keitel, Christian |
collection | PubMed |
description | Neural processing of dynamic continuous visual input, and cognitive influences thereon, are frequently studied in paradigms employing strictly rhythmic stimulation. However, the temporal structure of natural stimuli is hardly ever fully rhythmic but possesses certain spectral bandwidths (e.g. lip movements in speech, gestures). Examining periodic brain responses elicited by strictly rhythmic stimulation might thus represent ideal, yet isolated cases. Here, we tested how the visual system reflects quasi-rhythmic stimulation with frequencies continuously varying within ranges of classical theta (4–7 Hz), alpha (8–13 Hz) and beta bands (14–20 Hz) using EEG. Our findings substantiate a systematic and sustained neural phase-locking to stimulation in all three frequency ranges. Further, we found that allocation of spatial attention enhances EEG-stimulus locking to theta- and alpha-band stimulation. Our results bridge recent findings regarding phase locking (“entrainment”) to quasi-rhythmic visual input and “frequency-tagging” experiments employing strictly rhythmic stimulation. We propose that sustained EEG-stimulus locking can be considered as a continuous neural signature of processing dynamic sensory input in early visual cortices. Accordingly, EEG-stimulus locking serves to trace the temporal evolution of rhythmic as well as quasi-rhythmic visual input and is subject to attentional bias. |
format | Online Article Text |
id | pubmed-5312821 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Academic Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-53128212017-02-22 Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation Keitel, Christian Thut, Gregor Gross, Joachim Neuroimage Article Neural processing of dynamic continuous visual input, and cognitive influences thereon, are frequently studied in paradigms employing strictly rhythmic stimulation. However, the temporal structure of natural stimuli is hardly ever fully rhythmic but possesses certain spectral bandwidths (e.g. lip movements in speech, gestures). Examining periodic brain responses elicited by strictly rhythmic stimulation might thus represent ideal, yet isolated cases. Here, we tested how the visual system reflects quasi-rhythmic stimulation with frequencies continuously varying within ranges of classical theta (4–7 Hz), alpha (8–13 Hz) and beta bands (14–20 Hz) using EEG. Our findings substantiate a systematic and sustained neural phase-locking to stimulation in all three frequency ranges. Further, we found that allocation of spatial attention enhances EEG-stimulus locking to theta- and alpha-band stimulation. Our results bridge recent findings regarding phase locking (“entrainment”) to quasi-rhythmic visual input and “frequency-tagging” experiments employing strictly rhythmic stimulation. We propose that sustained EEG-stimulus locking can be considered as a continuous neural signature of processing dynamic sensory input in early visual cortices. Accordingly, EEG-stimulus locking serves to trace the temporal evolution of rhythmic as well as quasi-rhythmic visual input and is subject to attentional bias. Academic Press 2017-02-01 /pmc/articles/PMC5312821/ /pubmed/27867090 http://dx.doi.org/10.1016/j.neuroimage.2016.11.043 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 Keitel, Christian Thut, Gregor Gross, Joachim Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
title | Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
title_full | Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
title_fullStr | Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
title_full_unstemmed | Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
title_short | Visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
title_sort | visual cortex responses reflect temporal structure of continuous quasi-rhythmic sensory stimulation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5312821/ https://www.ncbi.nlm.nih.gov/pubmed/27867090 http://dx.doi.org/10.1016/j.neuroimage.2016.11.043 |
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