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Language Disabilities in Three Twin Pairs and Their Relatives

Published online by Cambridge University Press:  01 August 2014

Maria R.L. Borges-Osório  and
Francisco M. Salzano
Maria R.L. Borges-Osório
Affiliation:
Department of Genetics, Institute of Biosciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Francisco M. Salzano*
Affiliation:
Department of Genetics, Institute of Biosciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
*
Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 1953, 90000 Porto Alegre, RS, Brazil

Abstract

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Three pairs of monozygotic twins were ascertained during a general survey of language disabilities conducted among schoolchildren of Porto Alegre, Brazil. Two of them were concordant for dysgraphia, dysorthographia, dyslexia, and speech defects, while the other was concordant for dysorthographia and dyslexia, but discordant for dysgraphia. Two of the mothers and two sibs also presented language problems, but of a type that was not completely similar to those of the twins. Concomitant neurological and psychological studies, as well as the family histories, helped to understand the similarities and dissimilarities observed.

Keywords

Language disabilitiesNeuropsychological evaluationsDysgraphiaDysorthographiaDyslexiaSpeech defects
Type
Case Report
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 34 , Issue 1-2 , April 1985 , pp. 95 - 100
Copyright
Copyright © The International Society for Twin Studies 1985

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