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Individual alpha frequency appears unrelated to the latency of early visual responses

A large body of work has linked neural oscillations in the alpha-band (8–13 Hz) to visual perceptual outcomes. In particular, studies have found that alpha phase prior to stimulus onset predicts stimulus detection, and sensory responses and that the frequency of alpha can predict temporal properties...

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Autores principales: Morrow, Audrey, Dou, Wei, Samaha, Jason
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10126513/
https://www.ncbi.nlm.nih.gov/pubmed/37113149
http://dx.doi.org/10.3389/fnins.2023.1118910
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author Morrow, Audrey
Dou, Wei
Samaha, Jason
author_facet Morrow, Audrey
Dou, Wei
Samaha, Jason
author_sort Morrow, Audrey
collection PubMed
description A large body of work has linked neural oscillations in the alpha-band (8–13 Hz) to visual perceptual outcomes. In particular, studies have found that alpha phase prior to stimulus onset predicts stimulus detection, and sensory responses and that the frequency of alpha can predict temporal properties of perception. These findings have bolstered the idea that alpha-band oscillations reflect rhythmic sampling of visual information, however the mechanisms of this are unclear. Recently two contrasting hypotheses have been proposed. According to the rhythmic perception account, alpha oscillations impose phasic inhibition on perceptual processing and primarily modulate the amplitude or strength of visual responses and thus the likelihood of stimulus detection. On the other hand, the discrete perception account proposes that alpha activity discretizes perceptual inputs thereby reorganizing the timing (not only the strength) of perceptual and neural processes. In this paper, we sought neural evidence for the discrete perception account by assessing the correlation between individual alpha frequencies (IAF) and the latency of early visual evoked event-related potential (ERP) components. If alpha cycles were responsible for shifting neural events in time, then we may expect higher alpha frequencies to be associated with earlier afferent visual ERPs. Participants viewed large checkerboard stimuli presented to either the upper or lower visual field that were designed to elicit a large C1 ERP response (thought to index feedforward primary visual cortex activation). We found no reliable correlation between IAF and the C1 latency, or subsequent ERP component latencies, suggesting that the timing of these visual-evoked potentials was not modulated by alpha frequency. Our results thus fail to find evidence for discrete perception at the level of early visual responses but leave open the possibility of rhythmic perception.
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spelling pubmed-101265132023-04-26 Individual alpha frequency appears unrelated to the latency of early visual responses Morrow, Audrey Dou, Wei Samaha, Jason Front Neurosci Neuroscience A large body of work has linked neural oscillations in the alpha-band (8–13 Hz) to visual perceptual outcomes. In particular, studies have found that alpha phase prior to stimulus onset predicts stimulus detection, and sensory responses and that the frequency of alpha can predict temporal properties of perception. These findings have bolstered the idea that alpha-band oscillations reflect rhythmic sampling of visual information, however the mechanisms of this are unclear. Recently two contrasting hypotheses have been proposed. According to the rhythmic perception account, alpha oscillations impose phasic inhibition on perceptual processing and primarily modulate the amplitude or strength of visual responses and thus the likelihood of stimulus detection. On the other hand, the discrete perception account proposes that alpha activity discretizes perceptual inputs thereby reorganizing the timing (not only the strength) of perceptual and neural processes. In this paper, we sought neural evidence for the discrete perception account by assessing the correlation between individual alpha frequencies (IAF) and the latency of early visual evoked event-related potential (ERP) components. If alpha cycles were responsible for shifting neural events in time, then we may expect higher alpha frequencies to be associated with earlier afferent visual ERPs. Participants viewed large checkerboard stimuli presented to either the upper or lower visual field that were designed to elicit a large C1 ERP response (thought to index feedforward primary visual cortex activation). We found no reliable correlation between IAF and the C1 latency, or subsequent ERP component latencies, suggesting that the timing of these visual-evoked potentials was not modulated by alpha frequency. Our results thus fail to find evidence for discrete perception at the level of early visual responses but leave open the possibility of rhythmic perception. Frontiers Media S.A. 2023-04-11 /pmc/articles/PMC10126513/ /pubmed/37113149 http://dx.doi.org/10.3389/fnins.2023.1118910 Text en Copyright © 2023 Morrow, Dou and Samaha. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Morrow, Audrey
Dou, Wei
Samaha, Jason
Individual alpha frequency appears unrelated to the latency of early visual responses
title Individual alpha frequency appears unrelated to the latency of early visual responses
title_full Individual alpha frequency appears unrelated to the latency of early visual responses
title_fullStr Individual alpha frequency appears unrelated to the latency of early visual responses
title_full_unstemmed Individual alpha frequency appears unrelated to the latency of early visual responses
title_short Individual alpha frequency appears unrelated to the latency of early visual responses
title_sort individual alpha frequency appears unrelated to the latency of early visual responses
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10126513/
https://www.ncbi.nlm.nih.gov/pubmed/37113149
http://dx.doi.org/10.3389/fnins.2023.1118910
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