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Praxic and nonverbal cognitive deficits in a large family with a genetically transmitted speech and language disorder.

Vargha-Khadem, F. and Watkins, K. and Alcock, K. J. and Fletcher, P. and Passingham, R. (1995) Praxic and nonverbal cognitive deficits in a large family with a genetically transmitted speech and language disorder. Proceedings of the National Academy of Sciences, 92 (3). pp. 930-933. ISSN 0027-8424

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A pronounced speech and language disorder affecting half of the 30 members of the four-generational KE family has been attributed by some researchers to a specific defect in the generation of morphosyntactic rules. The reported selectivity of the impairment has led to the view that the affected members suffer from a grammar-specific disorder. Our investigations of the same KE family indicate that the inherited disorder has a broad phenotype which transcends impaired generation of syntactical rules and includes a striking articulatory impairment as well as defects in intellectual, linguistic, and orofacial praxic functions generally. Although the evidence from this family thus provides no support for the existence of "grammar genes," their linguistic difficulties do constitute a prominent part of their phenotype. Investigations of the neural and genetic correlates of their disorder could therefore uncover important clues to some of the bases of the primary human faculties of speech and language

Item Type: Journal Article
Journal or Publication Title: Proceedings of the National Academy of Sciences
Additional Information: TY - JOUR UI - 95148651 LA - eng PT - Journal Article DA - 19950303 IS - 0027-8424 SB - IM CY - UNITED STATES RP - NOT IN FILE
Uncontrolled Keywords: Cognition Disorders Family Female Genetics Human Intelligence Tests Language Language Disorders Language Tests Male Pedigree Phenotype physiopathology Psychomotor Disorders Speech Speech Disorders Support United States UNITED-STATES
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
B Philosophy. Psychology. Religion > BF Psychology
Departments: Faculty of Science and Technology > Psychology
Faculty of Arts & Social Sciences > Politics & International Relations (Merged into PPR 2010-08-01)
ID Code: 8787
Deposited By: Dr Katherine Alcock
Deposited On: 12 May 2008 16:18
Refereed?: Yes
Published?: Published
Last Modified: 20 Mar 2018 04:43
Identification Number:

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