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Arithmetic in the signing brain: Differences and similarities in arithmetic processing between deaf signers and hearing non-signers
Linköping University, Department of Behavioural Sciences and Learning, Disability Research Division. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0001-7091-9635
Linköping University, Department of Behavioural Sciences and Learning, Education, Teaching and Learning. Linköping University, Faculty of Educational Sciences.
Örebro University, Sweden.
2023 (English)In: Journal of Neuroscience Research, ISSN 0360-4012, E-ISSN 1097-4547, Vol. 101, no 1, p. 172-195Article in journal (Refereed) Published
Abstract [en]

Deaf signers and hearing non-signers have previously been shown to recruit partially different brain regions during simple arithmetic. In light of the triple code model, the differences were interpreted as relating to stronger recruitment of the verbal system of numerical processing, that is, left angular and inferior frontal gyrus, in hearing non-signers, and of the quantity system of numerical processing, that is, right horizontal intraparietal sulcus, for deaf signers. The main aim of the present study was to better understand similarities and differences in the neural correlates supporting arithmetic in deaf compared to hearing individuals. Twenty-nine adult deaf signers and 29 hearing non-signers were enrolled in an functional magnetic resonance imaging study of simple and difficult subtraction and multiplication. Brain imaging data were analyzed using whole-brain analysis, region of interest analysis, and functional connectivity analysis. Although the groups were matched on age, gender, and nonverbal intelligence, the deaf group performed generally poorer than the hearing group in arithmetic. Nevertheless, we found generally similar networks to be involved for both groups, the only exception being the involvement of the left inferior frontal gyrus. This region was activated significantly stronger for the hearing compared to the deaf group but showed stronger functional connectivity with the left superior temporal gyrus in the deaf, compared to the hearing, group. These results lend no support to increased recruitment of the quantity system in deaf signers. Perhaps the reason for performance differences is to be found in other brain regions not included in the original triple code model.

Place, publisher, year, edition, pages
Wiley , 2023. Vol. 101, no 1, p. 172-195
Keywords [en]
arithmetic; deafness; functional magnetic resonance imaging; RRID; SCR_009550; sign language
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:liu:diva-189770DOI: 10.1002/jnr.25138ISI: 000869664600001PubMedID: 36259315OAI: oai:DiVA.org:liu-189770DiVA, id: diva2:1709146
Available from: 2022-11-08 Created: 2022-11-08 Last updated: 2024-01-18Bibliographically approved

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Andin, Josefine

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