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The Organization of Working Memory Networks is Shaped by Early Sensory Experience
Linköpings universitet, Institutionen för beteendevetenskap och lärande. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Institutet för handikappvetenskap (IHV). UCL, England; Univ East Anglia, England. (Linnaeus Ctr HEAD)
Linköpings universitet, Institutionen för beteendevetenskap och lärande, Handikappvetenskap. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Institutet för handikappvetenskap (IHV).
London South Bank Univ, England.
Linköpings universitet, Institutionen för beteendevetenskap och lärande, Handikappvetenskap. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Institutet för handikappvetenskap (IHV).
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2018 (engelsk)Inngår i: Cerebral Cortex, ISSN 1047-3211, E-ISSN 1460-2199, Vol. 28, nr 10, s. 3540-3554Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Early deafness results in crossmodal reorganization of the superior temporal cortex (STC). Here, we investigated the effect of deafness on cognitive processing. Specifically, we studied the reorganization, due to deafness and sign language (SL) knowledge, of linguistic and nonlinguistic visual working memory (WM). We conducted an fMRI experiment in groups that differed in their hearing status and SL knowledge: deaf native signers, and hearing native signers, hearing nonsigners. Participants performed a 2-back WM task and a control task. Stimuli were signs from British Sign Language (BSL) or moving nonsense objects in the form of point-light displays. We found characteristic WM activations in fronto-parietal regions in all groups. However, deaf participants also recruited bilateral posterior STC during the WM task, independently of the linguistic content of the stimuli, and showed less activation in fronto-parietal regions. Resting-state connectivity analysis showed increased connectivity between frontal regions and STC in deaf compared to hearing individuals. WM for signs did not elicit differential activations, suggesting that SL WM does not rely on modality-specific linguistic processing. These findings suggest that WM networks are reorganized due to early deafness, and that the organization of cognitive networks is shaped by the nature of the sensory inputs available during development.

sted, utgiver, år, opplag, sider
OXFORD UNIV PRESS INC , 2018. Vol. 28, nr 10, s. 3540-3554
Emneord [en]
deafness; language; neural plasticity; working memory
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-152070DOI: 10.1093/cercor/bhx222ISI: 000446091100012PubMedID: 28968707OAI: oai:DiVA.org:liu-152070DiVA, id: diva2:1258323
Merknad

Funding Agencies|Swedish Council for Working Life and Social Research [2008-0846]; Swedish Research Council [349-2007-8654]; Economic and Social Research Council of Great Britain [RES-620-28-6001, RES-620-28-0002]

Tilgjengelig fra: 2018-10-24 Laget: 2018-10-24 Sist oppdatert: 2018-10-24

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