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Williams syndrome: a surprising deficit in oromotor praxis in a population with proficient language production.

Krishnan, S; Bergström, L; Alcock, KJ; Dick, F; Karmiloff-Smith, A; (2015) Williams syndrome: a surprising deficit in oromotor praxis in a population with proficient language production. Neuropsychologia , 67 82 - 90. 10.1016/j.neuropsychologia.2014.11.032. Green open access

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Abstract

Williams Syndrome (WS) is a neurodevelopmental disorder of known genetic origin, characterized by serious delays in language onset yet relatively verbose, intelligible and fluent speech in late childhood and adulthood. How do motor abilities relate to language in this group? We investigated planning and co-ordination of the movement of the speech articulators (oromotor praxis) in 28 fluent-speaking individuals with WS, aged between 12 and 30 years. Results indicate that, despite their fluent language, oromotor praxis was impaired in WS relative to two groups of typically-developing children, matched on either vocabulary or visuospatial ability. These findings suggest that the ability to plan, co-ordinate and execute complex sensorimotor movements contribute to an explanation of the delay in expressive language early in development in this neurodevelopmental disorder. In the discussion, we turn to more general issues of how individual variation in oromotor praxis may account for differences in speech/language production abilities across developmental language disorders.

Type: Article
Title: Williams syndrome: a surprising deficit in oromotor praxis in a population with proficient language production.
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neuropsychologia.2014.11.032
Publisher version: http://dx.doi.org/10.1016/j.neuropsychologia.2014....
Language: English
Additional information: © 2014 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
Keywords: Motor ability, Orofacial movements, Sequencing, Speech motor control, Williams syndrome
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
URI: https://discovery.ucl.ac.uk/id/eprint/1462387
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