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Language lateralization of hearing native signers: A functional transcranial Doppler sonography (fTCD) study of speech and sign production

Gutierrez-Sigut, E; Daws, R; Payne, H; Blott, J; Marshall, C; MacSweeney, M; (2015) Language lateralization of hearing native signers: A functional transcranial Doppler sonography (fTCD) study of speech and sign production. Brain and Language , 151 pp. 23-34. 10.1016/j.bandl.2015.10.006. Green open access

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Abstract

Neuroimaging studies suggest greater involvement of the left parietal lobe in sign language compared to speech production. This stronger activation might be linked to the specific demands of sign encoding and proprioceptive monitoring. In Experiment 1 we investigate hemispheric lateralization during sign and speech generation in hearing native users of English and British Sign Language (BSL). Participants exhibited stronger lateralization during BSL than English production. In Experiment 2 we investigated whether this increased lateralization index could be due exclusively to the higher motoric demands of sign production. Sign naïve participants performed a phonological fluency task in English and a non-sign repetition task. Participants were left lateralized in the phonological fluency task but there was no consistent pattern of lateralization for the non-sign repetition in these hearing non-signers. The current data demonstrate stronger left hemisphere lateralization for producing signs than speech, which was not primarily driven by motoric articulatory demands.

Type: Article
Title: Language lateralization of hearing native signers: A functional transcranial Doppler sonography (fTCD) study of speech and sign production
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.bandl.2015.10.006
Publisher version: http://dx.doi.org/10.1016/j.bandl.2015.10.006
Language: English
Additional information: © 2015 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).
Keywords: Hearing native signers, Language lateralization, Language production, Phonological fluency, Semantic fluency, Sign language, fTCD
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Education
UCL > Provost and Vice Provost Offices > School of Education > UCL Institute of Education
UCL > Provost and Vice Provost Offices > School of Education > UCL Institute of Education > IOE - Psychology and Human Development
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: http://discovery.ucl.ac.uk/id/eprint/1475558
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