Show simple item record

dc.contributor.author
McCaskey, Ursina
dc.contributor.author
von Aster, Michael
dc.contributor.author
Kucian, Karin
dc.date.accessioned
2018-08-31T12:03:51Z
dc.date.available
2017-06-12T20:45:59Z
dc.date.available
2018-08-31T12:03:51Z
dc.date.issued
2017-03
dc.identifier.other
10.3389/fnhum.2017.00102
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/130241
dc.identifier.doi
10.3929/ethz-b-000130241
dc.description.abstract
The link between number and space has been discussed in the literature for some time, resulting in the theory that number, space and time might be part of a generalized magnitude system. To date, several behavioral and neuroimaging findings support the notion of a generalized magnitude system, although contradictory results showing a partial overlap or separate magnitude systems are also found. The possible existence of a generalized magnitude processing area leads to the question how individuals with developmental dyscalculia (DD), known for deficits in numerical-arithmetical abilities, process magnitudes. By means of neuropsychological tests and functional magnetic resonance imaging (fMRI) we aimed to examine the relationship between number and space in typical and atypical development. Participants were 16 adolescents with DD (14.1 years) and 14 typically developing (TD) peers (13.8 years). In the fMRI paradigm participants had to perform discrete (arrays of dots) and continuous magnitude (angles) comparisons as well as a mental rotation task. In the neuropsychological tests, adolescents with dyscalculia performed significantly worse in numerical and complex visuo-spatial tasks. However, they showed similar results to TD peers when making discrete and continuous magnitude decisions during the neuropsychological tests and the fMRI paradigm. A conjunction analysis of the fMRI data revealed commonly activated higher order visual (inferior and middle occipital gyrus) and parietal (inferior and superior parietal lobe) magnitude areas for the discrete and continuous magnitude tasks. Moreover, no differences were found when contrasting both magnitude processing conditions, favoring the possibility of a generalized magnitude system. Group comparisons further revealed that dyscalculic subjects showed increased activation in domain general regions, whilst TD peers activate domain specific areas to a greater extent. In conclusion, our results point to the existence of a generalized magnitude system in the occipito-parietal stream in typical development. The detailed investigation of spatial and numerical magnitude abilities in DD reveals that the deficits in number processing and arithmetic cannot be explained with a general magnitude deficiency. Our results further indicate that multiple neuro-cognitive components might contribute to the explanation of DD.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers Research Foundation
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Magnitude processing
en_US
dc.subject
Visuo-spatial processing
en_US
dc.subject
Numerosity
en_US
dc.subject
Adolescents
en_US
dc.subject
Developmental dyscalculia
en_US
dc.subject
Functional magnetic resonance imaging
en_US
dc.title
Adolescents with Developmental Dyscalculia Do Not Have a Generalized Magnitude Deficit-Processing of Discrete and Continuous Magnitudes
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2017-03-20
ethz.journal.title
Frontiers in Human Neuroscience
ethz.journal.volume
11
en_US
ethz.pages.start
102
en_US
ethz.size
19 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
010194181
ethz.publication.place
Lausanne
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-12T20:47:14Z
ethz.source
ECIT
ethz.identifier.importid
imp59365564956d815936
ethz.ecitpid
pub:193244
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T15:23:24Z
ethz.rosetta.lastUpdated
2018-08-31T12:03:55Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Adolescents%20with%20Developmental%20Dyscalculia%20Do%20Not%20Have%20a%20Generalized%20Magnitude%20Deficit-Processing%20of%20Discrete%20and%20Continuous%20Magnitudes&rft.jtitle=Frontiers%20in%20Human%20Neuroscience&rft.date=2017-03&rft.volume=11&rft.spage=102&rft.au=McCaskey,%20Ursina&von%20Aster,%20Michael&Kucian,%20Karin&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record