Cargando…

Bottom-up Retinotopic Organization Supports Top-down Mental Imagery

Finding a path between locations is a routine task in daily life. Mental navigation is often used to plan a route to a destination that is not visible from the current location. We first used functional magnetic resonance imaging (fMRI) and surface-based averaging methods to find high-level brain re...

Descripción completa

Detalles Bibliográficos
Autores principales: Huang, Ruey-Song, Sereno, Martin I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Bentham Open 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3905356/
https://www.ncbi.nlm.nih.gov/pubmed/24478813
http://dx.doi.org/10.2174/1874440001307010058
_version_ 1782301328532307968
author Huang, Ruey-Song
Sereno, Martin I.
author_facet Huang, Ruey-Song
Sereno, Martin I.
author_sort Huang, Ruey-Song
collection PubMed
description Finding a path between locations is a routine task in daily life. Mental navigation is often used to plan a route to a destination that is not visible from the current location. We first used functional magnetic resonance imaging (fMRI) and surface-based averaging methods to find high-level brain regions involved in imagined navigation between locations in a building very familiar to each participant. This revealed a mental navigation network that includes the precuneus, retrosplenial cortex (RSC), parahippocampal place area (PPA), occipital place area (OPA), supplementary motor area (SMA), premotor cortex, and areas along the medial and anterior intraparietal sulcus. We then visualized retinotopic maps in the entire cortex using wide-field, natural scene stimuli in a separate set of fMRI experiments. This revealed five distinct visual streams or ‘fingers’ that extend anteriorly into middle temporal, superior parietal, medial parietal, retrosplenial and ventral occipitotemporal cortex. By using spherical morphing to overlap these two data sets, we showed that the mental navigation network primarily occupies areas that also contain retinotopic maps. Specifically, scene-selective regions RSC, PPA and OPA have a common emphasis on the far periphery of the upper visual field. These results suggest that bottom-up retinotopic organization may help to efficiently encode scene and location information in an eye-centered reference frame for top-down, internally generated mental navigation. This study pushes the border of visual cortex further anterior than was initially expected.
format Online
Article
Text
id pubmed-3905356
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Bentham Open
record_format MEDLINE/PubMed
spelling pubmed-39053562014-01-29 Bottom-up Retinotopic Organization Supports Top-down Mental Imagery Huang, Ruey-Song Sereno, Martin I. Open Neuroimag J Article Finding a path between locations is a routine task in daily life. Mental navigation is often used to plan a route to a destination that is not visible from the current location. We first used functional magnetic resonance imaging (fMRI) and surface-based averaging methods to find high-level brain regions involved in imagined navigation between locations in a building very familiar to each participant. This revealed a mental navigation network that includes the precuneus, retrosplenial cortex (RSC), parahippocampal place area (PPA), occipital place area (OPA), supplementary motor area (SMA), premotor cortex, and areas along the medial and anterior intraparietal sulcus. We then visualized retinotopic maps in the entire cortex using wide-field, natural scene stimuli in a separate set of fMRI experiments. This revealed five distinct visual streams or ‘fingers’ that extend anteriorly into middle temporal, superior parietal, medial parietal, retrosplenial and ventral occipitotemporal cortex. By using spherical morphing to overlap these two data sets, we showed that the mental navigation network primarily occupies areas that also contain retinotopic maps. Specifically, scene-selective regions RSC, PPA and OPA have a common emphasis on the far periphery of the upper visual field. These results suggest that bottom-up retinotopic organization may help to efficiently encode scene and location information in an eye-centered reference frame for top-down, internally generated mental navigation. This study pushes the border of visual cortex further anterior than was initially expected. Bentham Open 2013-12-30 /pmc/articles/PMC3905356/ /pubmed/24478813 http://dx.doi.org/10.2174/1874440001307010058 Text en © Huang and Sereno; Licensee Bentham Open. http://creativecommons.org/licenses/by-nc/3.0/ This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
spellingShingle Article
Huang, Ruey-Song
Sereno, Martin I.
Bottom-up Retinotopic Organization Supports Top-down Mental Imagery
title Bottom-up Retinotopic Organization Supports Top-down Mental Imagery
title_full Bottom-up Retinotopic Organization Supports Top-down Mental Imagery
title_fullStr Bottom-up Retinotopic Organization Supports Top-down Mental Imagery
title_full_unstemmed Bottom-up Retinotopic Organization Supports Top-down Mental Imagery
title_short Bottom-up Retinotopic Organization Supports Top-down Mental Imagery
title_sort bottom-up retinotopic organization supports top-down mental imagery
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3905356/
https://www.ncbi.nlm.nih.gov/pubmed/24478813
http://dx.doi.org/10.2174/1874440001307010058
work_keys_str_mv AT huangrueysong bottomupretinotopicorganizationsupportstopdownmentalimagery
AT serenomartini bottomupretinotopicorganizationsupportstopdownmentalimagery