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Predicted Selective Increase of Cortical Magnification Due to Cortical Folding

ABSTRACT: The cortical magnification matrix M is introduced founded on a notion similar to that of the scalar cortical magnification factor M. Unlike M, this matrix is suitable to describe anisotropy in cortical magnification, which is of particular interest in the highly gyrified human cerebral cor...

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Detalles Bibliográficos
Autores principales: Dahlem, Markus A, Tusch, Jan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3571916/
https://www.ncbi.nlm.nih.gov/pubmed/23245207
http://dx.doi.org/10.1186/2190-8567-2-14
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author Dahlem, Markus A
Tusch, Jan
author_facet Dahlem, Markus A
Tusch, Jan
author_sort Dahlem, Markus A
collection PubMed
description ABSTRACT: The cortical magnification matrix M is introduced founded on a notion similar to that of the scalar cortical magnification factor M. Unlike M, this matrix is suitable to describe anisotropy in cortical magnification, which is of particular interest in the highly gyrified human cerebral cortex. The advantage of our tensor method over other surface-based 3D methods to explore cortical morphometry is that M expresses cortical quantities in the corresponding sensory space. It allows us to investigate the spatial relation between sensory function and anatomical structure. To this end, we consider the calcarine sulcus (CS) as an anatomical landmark for the primary visual cortex (V1). We found that a stereotypically formed 3D model of V1 compared to a flat model explains an excess of cortical tissue for the representation of visual information coming from the horizon of the visual field. This suggests that the intrinsic geometry of this sulcus is adapted to encephalize a particular function along the horizon. Since visual functions are assumed to be M-scaled, cortical folding can serve as an anatomical basis for increased functionality on the horizon similar to a retinal specialization known as visual streak, which is found in animals with lower encephalization. Thus, the gain of surface area by cortical folding links anatomical structure to cortical function in a previously unrecognized way, which may guide sulci development.
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spelling pubmed-35719162013-02-15 Predicted Selective Increase of Cortical Magnification Due to Cortical Folding Dahlem, Markus A Tusch, Jan J Math Neurosci Research ABSTRACT: The cortical magnification matrix M is introduced founded on a notion similar to that of the scalar cortical magnification factor M. Unlike M, this matrix is suitable to describe anisotropy in cortical magnification, which is of particular interest in the highly gyrified human cerebral cortex. The advantage of our tensor method over other surface-based 3D methods to explore cortical morphometry is that M expresses cortical quantities in the corresponding sensory space. It allows us to investigate the spatial relation between sensory function and anatomical structure. To this end, we consider the calcarine sulcus (CS) as an anatomical landmark for the primary visual cortex (V1). We found that a stereotypically formed 3D model of V1 compared to a flat model explains an excess of cortical tissue for the representation of visual information coming from the horizon of the visual field. This suggests that the intrinsic geometry of this sulcus is adapted to encephalize a particular function along the horizon. Since visual functions are assumed to be M-scaled, cortical folding can serve as an anatomical basis for increased functionality on the horizon similar to a retinal specialization known as visual streak, which is found in animals with lower encephalization. Thus, the gain of surface area by cortical folding links anatomical structure to cortical function in a previously unrecognized way, which may guide sulci development. Springer 2012-12-17 /pmc/articles/PMC3571916/ /pubmed/23245207 http://dx.doi.org/10.1186/2190-8567-2-14 Text en Copyright ©2012 M.A. Dahlem, J. Tusch; licensee Springer http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Dahlem, Markus A
Tusch, Jan
Predicted Selective Increase of Cortical Magnification Due to Cortical Folding
title Predicted Selective Increase of Cortical Magnification Due to Cortical Folding
title_full Predicted Selective Increase of Cortical Magnification Due to Cortical Folding
title_fullStr Predicted Selective Increase of Cortical Magnification Due to Cortical Folding
title_full_unstemmed Predicted Selective Increase of Cortical Magnification Due to Cortical Folding
title_short Predicted Selective Increase of Cortical Magnification Due to Cortical Folding
title_sort predicted selective increase of cortical magnification due to cortical folding
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3571916/
https://www.ncbi.nlm.nih.gov/pubmed/23245207
http://dx.doi.org/10.1186/2190-8567-2-14
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