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The Organization of Working Memory Networks is Shaped by Early Sensory Experience
Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research. UCL, England; Univ East Anglia, England. (Linnaeus Ctr HEAD)
Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research.
London South Bank Univ, England.
Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research.
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2018 (English)In: Cerebral Cortex, ISSN 1047-3211, E-ISSN 1460-2199, Vol. 28, no 10, p. 3540-3554Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
OXFORD UNIV PRESS INC , 2018. Vol. 28, no 10, p. 3540-3554
Keywords [en]
deafness; language; neural plasticity; working memory
National Category
Psychology (excluding Applied Psychology)
Identifiers
URN: urn:nbn:se:liu:diva-152070DOI: 10.1093/cercor/bhx222ISI: 000446091100012PubMedID: 28968707OAI: oai:DiVA.org:liu-152070DiVA, id: diva2:1258323
Note

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]

Available from: 2018-10-24 Created: 2018-10-24 Last updated: 2018-10-24

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Cardin, VeliaRudner, MaryAndin, JosefineRönnberg, Jerker
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Department of Behavioural Sciences and LearningFaculty of Arts and SciencesThe Swedish Institute for Disability ResearchDisability Research
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