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Investigating language lateralization during phonological and semantic fluency tasks using functional transcranial Doppler sonography.

Gutierrez-Sigut, E; Payne, H; MacSweeney, M; (2015) Investigating language lateralization during phonological and semantic fluency tasks using functional transcranial Doppler sonography. Laterality , 20 (1) 49 - 68. 10.1080/1357650X.2014.914950. Green open access

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Abstract

Although there is consensus that the left hemisphere plays a critical role in language processing, some questions remain. Here we examine the influence of overt versus covert speech production on lateralization, the relationship between lateralization and behavioural measures of language performance and the strength of lateralization across the subcomponents of language. The present study used functional transcranial Doppler sonography (fTCD) to investigate lateralization of phonological and semantic fluency during both overt and covert word generation in right-handed adults. The laterality index (LI) was left lateralized in all conditions, and there was no difference in the strength of LI between overt and covert speech. This supports the validity of using overt speech in fTCD studies, another benefit of which is a reliable measure of speech production.

Type: Article
Title: Investigating language lateralization during phonological and semantic fluency tasks using functional transcranial Doppler sonography.
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/1357650X.2014.914950
Publisher version: http://dx.dok.org/10.1080/1357650X.2014.914950
Language: English
Additional information: © 2014 The Author(s). Published by Routledge This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The moral rights of the named author(s) have been asserted. Permission is granted subject to the terms of the License under which the work was published. Please check the License conditions for the work which you wish to reuse. Full and appropriate attribution must be given. This permission does not cover any third party copyrighted material which may appear in the work requested.
Keywords: Language lateralization, Phonological fluency, Semantic fluency, Word generation, fTCD
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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: https://discovery.ucl.ac.uk/id/eprint/1431464
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