About: The organizational principles of de-differentiated topographic maps

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	The organizational principles of de-differentiated topographic maps
Creator	Liu, Peng Chrysidou, Anastasia Doehler, Juliane Kuehn, Esther Wolbers, Thomas
source	BioRxiv
abstract	Topographic maps are a fundamental feature of cortex architecture in the mammalian brain. One common theory is that the de-differentiation of topographic maps links to impairments in everyday behavior due to less precise functional map readouts. Here, we tested this theory by characterizing de-differentiated topographic maps in primary somatosensory cortex (SI) of younger and older adults by means of ultra-high resolution functional magnetic resonance imaging together with perceptual finger individuation and hand dexterity. Older adults’ SI maps showed similar amplitude, size, and levels of stimulus-related noise than younger adults’ SI maps, but presented with less representational similarity between distant fingers. Larger population receptive field sizes in older adults’ maps did not correlate with behavior, whereas reduced cortical distances related to better hand dexterity. Our data uncover the drawbacks of a simple de-differentiation model of topographic map function, and motivate the introduction of a feature-based model of cortical reorganization.
has issue date	2020-07-09(xsd:dateTime)
bibo:doi	10.1101/2020.07.08.179978
has license	biorxiv
sha1sum (hex)	6c82a76e7080c0eed9e2d6c82fe7a7a080291607
schema:url	https://doi.org/10.1101/2020.07.08.179978
resource representing a document's title	The organizational principles of de-differentiated topographic maps
schema:publication	bioRxiv
resource representing a document's body	covid:6c82a76e7080c0eed9e2d6c82fe7a7a080291607#body_text
is schema:about of	named entity 'maps' named entity 'primary somatosensory cortex' named entity 'The' covid:arg/6c82a76e7080c0eed9e2d6c82fe7a7a080291607 named entity 'tested' »more»

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