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Selectivity to Translational Egomotion in Human Brain Motion Areas

The optic flow generated when a person moves through the environment can be locally decomposed into several basic components, including radial, circular, translational and spiral motion. Since their analysis plays an important part in the visual perception and control of locomotion and posture it is...

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Autores principales: Pitzalis, Sabrina, Sdoia, Stefano, Bultrini, Alessandro, Committeri, Giorgia, Di Russo, Francesco, Fattori, Patrizia, Galletti, Claudio, Galati, Gaspare
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3618224/
https://www.ncbi.nlm.nih.gov/pubmed/23577096
http://dx.doi.org/10.1371/journal.pone.0060241
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author Pitzalis, Sabrina
Sdoia, Stefano
Bultrini, Alessandro
Committeri, Giorgia
Di Russo, Francesco
Fattori, Patrizia
Galletti, Claudio
Galati, Gaspare
author_facet Pitzalis, Sabrina
Sdoia, Stefano
Bultrini, Alessandro
Committeri, Giorgia
Di Russo, Francesco
Fattori, Patrizia
Galletti, Claudio
Galati, Gaspare
author_sort Pitzalis, Sabrina
collection PubMed
description The optic flow generated when a person moves through the environment can be locally decomposed into several basic components, including radial, circular, translational and spiral motion. Since their analysis plays an important part in the visual perception and control of locomotion and posture it is likely that some brain regions in the primate dorsal visual pathway are specialized to distinguish among them. The aim of this study is to explore the sensitivity to different types of egomotion-compatible visual stimulations in the human motion-sensitive regions of the brain. Event-related fMRI experiments, 3D motion and wide-field stimulation, functional localizers and brain mapping methods were used to study the sensitivity of six distinct motion areas (V6, MT, MST+, V3A, CSv and an Intra-Parietal Sulcus motion [IPSmot] region) to different types of optic flow stimuli. Results show that only areas V6, MST+ and IPSmot are specialized in distinguishing among the various types of flow patterns, with a high response for the translational flow which was maximum in V6 and IPSmot and less marked in MST+. Given that during egomotion the translational optic flow conveys differential information about the near and far external objects, areas V6 and IPSmot likely process visual egomotion signals to extract information about the relative distance of objects with respect to the observer. Since area V6 is also involved in distinguishing object-motion from self-motion, it could provide information about location in space of moving and static objects during self-motion, particularly in a dynamically unstable environment.
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spelling pubmed-36182242013-04-10 Selectivity to Translational Egomotion in Human Brain Motion Areas Pitzalis, Sabrina Sdoia, Stefano Bultrini, Alessandro Committeri, Giorgia Di Russo, Francesco Fattori, Patrizia Galletti, Claudio Galati, Gaspare PLoS One Research Article The optic flow generated when a person moves through the environment can be locally decomposed into several basic components, including radial, circular, translational and spiral motion. Since their analysis plays an important part in the visual perception and control of locomotion and posture it is likely that some brain regions in the primate dorsal visual pathway are specialized to distinguish among them. The aim of this study is to explore the sensitivity to different types of egomotion-compatible visual stimulations in the human motion-sensitive regions of the brain. Event-related fMRI experiments, 3D motion and wide-field stimulation, functional localizers and brain mapping methods were used to study the sensitivity of six distinct motion areas (V6, MT, MST+, V3A, CSv and an Intra-Parietal Sulcus motion [IPSmot] region) to different types of optic flow stimuli. Results show that only areas V6, MST+ and IPSmot are specialized in distinguishing among the various types of flow patterns, with a high response for the translational flow which was maximum in V6 and IPSmot and less marked in MST+. Given that during egomotion the translational optic flow conveys differential information about the near and far external objects, areas V6 and IPSmot likely process visual egomotion signals to extract information about the relative distance of objects with respect to the observer. Since area V6 is also involved in distinguishing object-motion from self-motion, it could provide information about location in space of moving and static objects during self-motion, particularly in a dynamically unstable environment. Public Library of Science 2013-04-05 /pmc/articles/PMC3618224/ /pubmed/23577096 http://dx.doi.org/10.1371/journal.pone.0060241 Text en © 2013 Pitzalis et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Pitzalis, Sabrina
Sdoia, Stefano
Bultrini, Alessandro
Committeri, Giorgia
Di Russo, Francesco
Fattori, Patrizia
Galletti, Claudio
Galati, Gaspare
Selectivity to Translational Egomotion in Human Brain Motion Areas
title Selectivity to Translational Egomotion in Human Brain Motion Areas
title_full Selectivity to Translational Egomotion in Human Brain Motion Areas
title_fullStr Selectivity to Translational Egomotion in Human Brain Motion Areas
title_full_unstemmed Selectivity to Translational Egomotion in Human Brain Motion Areas
title_short Selectivity to Translational Egomotion in Human Brain Motion Areas
title_sort selectivity to translational egomotion in human brain motion areas
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3618224/
https://www.ncbi.nlm.nih.gov/pubmed/23577096
http://dx.doi.org/10.1371/journal.pone.0060241
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