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Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter
Adaptation can optimize information processing by allowing the visual system to always adjust to the environment. However, only a few studies have investigated how the visual system makes adjustments to repeatedly occurring changes in the input, still less about the related neural mechanism. Our pre...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7785701/ https://www.ncbi.nlm.nih.gov/pubmed/33424564 http://dx.doi.org/10.3389/fnhum.2020.589634 |
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author | Dong, Xue Du, Xinxin Bao, Min |
author_facet | Dong, Xue Du, Xinxin Bao, Min |
author_sort | Dong, Xue |
collection | PubMed |
description | Adaptation can optimize information processing by allowing the visual system to always adjust to the environment. However, only a few studies have investigated how the visual system makes adjustments to repeatedly occurring changes in the input, still less about the related neural mechanism. Our previous study found that contrast adaptation attenuated after multiple daily sessions of repeated adaptation, which was explained by the habituation of either the adapter’s effective strength or the adaptation mechanisms. To examine the former hypothesis, in the present study we used the frequency tagging technique to measure the adapter-elicited steady-state visual evoked potential (SSVEP) amplitudes. Participants repeatedly adapted to the same contrast adapter in a top-up manner for six continuous days, which was called training of adaptation. The behavioral adaptation effect and SSVEP response to the trained adapter and an untrained control adapter were measured before and after training. The psychophysical results showed that the effect of adaptation in the trained condition significantly reduced after training, replicating our previous finding. Contradicting the prediction of the hypothesis that repeated adaptation attenuated the effective strength of the adapter, the SSVEP amplitude was unchanged after training, which was further confirmed by an equivalence test. Taken together, the results challenge the account of habituation of adapter in repeated adaptation, while leaving the account of habituation of adaptation mechanism to be tested. |
format | Online Article Text |
id | pubmed-7785701 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-77857012021-01-07 Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter Dong, Xue Du, Xinxin Bao, Min Front Hum Neurosci Human Neuroscience Adaptation can optimize information processing by allowing the visual system to always adjust to the environment. However, only a few studies have investigated how the visual system makes adjustments to repeatedly occurring changes in the input, still less about the related neural mechanism. Our previous study found that contrast adaptation attenuated after multiple daily sessions of repeated adaptation, which was explained by the habituation of either the adapter’s effective strength or the adaptation mechanisms. To examine the former hypothesis, in the present study we used the frequency tagging technique to measure the adapter-elicited steady-state visual evoked potential (SSVEP) amplitudes. Participants repeatedly adapted to the same contrast adapter in a top-up manner for six continuous days, which was called training of adaptation. The behavioral adaptation effect and SSVEP response to the trained adapter and an untrained control adapter were measured before and after training. The psychophysical results showed that the effect of adaptation in the trained condition significantly reduced after training, replicating our previous finding. Contradicting the prediction of the hypothesis that repeated adaptation attenuated the effective strength of the adapter, the SSVEP amplitude was unchanged after training, which was further confirmed by an equivalence test. Taken together, the results challenge the account of habituation of adapter in repeated adaptation, while leaving the account of habituation of adaptation mechanism to be tested. Frontiers Media S.A. 2020-12-23 /pmc/articles/PMC7785701/ /pubmed/33424564 http://dx.doi.org/10.3389/fnhum.2020.589634 Text en Copyright © 2020 Dong, Du and Bao. http://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 | Human Neuroscience Dong, Xue Du, Xinxin Bao, Min Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter |
title | Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter |
title_full | Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter |
title_fullStr | Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter |
title_full_unstemmed | Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter |
title_short | Repeated Contrast Adaptation Does Not Cause Habituation of the Adapter |
title_sort | repeated contrast adaptation does not cause habituation of the adapter |
topic | Human Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7785701/ https://www.ncbi.nlm.nih.gov/pubmed/33424564 http://dx.doi.org/10.3389/fnhum.2020.589634 |
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