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Neural responses to apparent motion can be predicted by responses to non-moving stimuli

When two objects are presented in alternation at two locations, they are seen as a single object moving from one location to the other. This apparent motion (AM) percept is experienced for objects located at short and also at long distances. However, current models cannot explain how the brain integ...

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Detalles Bibliográficos
Autores principales: Poncet, Marlene, Ales, Justin M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Academic Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7422841/
https://www.ncbi.nlm.nih.gov/pubmed/32464291
http://dx.doi.org/10.1016/j.neuroimage.2020.116973
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author Poncet, Marlene
Ales, Justin M.
author_facet Poncet, Marlene
Ales, Justin M.
author_sort Poncet, Marlene
collection PubMed
description When two objects are presented in alternation at two locations, they are seen as a single object moving from one location to the other. This apparent motion (AM) percept is experienced for objects located at short and also at long distances. However, current models cannot explain how the brain integrates information over large distances to create such long-range AM. This study investigates the neural markers of AM by parcelling out the contribution of spatial and temporal interactions not specific to motion. In two experiments, participants’ EEG was recorded while they viewed two stimuli inducing AM. Different combinations of these stimuli were also shown in a static context to predict an AM neural response where no motion is perceived. We compared the goodness of fit between these different predictions and found consistent results in both experiments. At short-range, the addition of the inhibitory spatial and temporal interactions not specific to motion improved the AM prediction. However, there was no indication that spatial or temporal non-linear interactions were present at long-range. This suggests that short- and long-range AM rely on different neural mechanisms. Importantly, our results also show that at both short- and long-range, responses generated by a moving stimulus could be well predicted from conditions in which no motion is perceived. That is, the EEG response to a moving stimulus is simply a combination of individual responses to non-moving stimuli. This demonstrates a dissociation between the brain response and the subjective percept of motion.
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spelling pubmed-74228412020-09-01 Neural responses to apparent motion can be predicted by responses to non-moving stimuli Poncet, Marlene Ales, Justin M. Neuroimage Article When two objects are presented in alternation at two locations, they are seen as a single object moving from one location to the other. This apparent motion (AM) percept is experienced for objects located at short and also at long distances. However, current models cannot explain how the brain integrates information over large distances to create such long-range AM. This study investigates the neural markers of AM by parcelling out the contribution of spatial and temporal interactions not specific to motion. In two experiments, participants’ EEG was recorded while they viewed two stimuli inducing AM. Different combinations of these stimuli were also shown in a static context to predict an AM neural response where no motion is perceived. We compared the goodness of fit between these different predictions and found consistent results in both experiments. At short-range, the addition of the inhibitory spatial and temporal interactions not specific to motion improved the AM prediction. However, there was no indication that spatial or temporal non-linear interactions were present at long-range. This suggests that short- and long-range AM rely on different neural mechanisms. Importantly, our results also show that at both short- and long-range, responses generated by a moving stimulus could be well predicted from conditions in which no motion is perceived. That is, the EEG response to a moving stimulus is simply a combination of individual responses to non-moving stimuli. This demonstrates a dissociation between the brain response and the subjective percept of motion. Academic Press 2020-09 /pmc/articles/PMC7422841/ /pubmed/32464291 http://dx.doi.org/10.1016/j.neuroimage.2020.116973 Text en © 2020 The Author(s) 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
Poncet, Marlene
Ales, Justin M.
Neural responses to apparent motion can be predicted by responses to non-moving stimuli
title Neural responses to apparent motion can be predicted by responses to non-moving stimuli
title_full Neural responses to apparent motion can be predicted by responses to non-moving stimuli
title_fullStr Neural responses to apparent motion can be predicted by responses to non-moving stimuli
title_full_unstemmed Neural responses to apparent motion can be predicted by responses to non-moving stimuli
title_short Neural responses to apparent motion can be predicted by responses to non-moving stimuli
title_sort neural responses to apparent motion can be predicted by responses to non-moving stimuli
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7422841/
https://www.ncbi.nlm.nih.gov/pubmed/32464291
http://dx.doi.org/10.1016/j.neuroimage.2020.116973
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