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Genetic Bases of Stuttering: The State of the Art, 2011

Kraft S.J.a · Yairi E.b, c

Author affiliations

aWayne State University, Detroit, Mich., and bUniversity of Illinois at Urbana-Champaign, Urbana, Ill., USA; cTel Aviv University, Tel Aviv, Israel

Corresponding Author

Shelly Jo Kraft

Communication Sciences and Disorders

Wayne State University

60 Farnsworth Street, Detroit, MI 48202 (USA)

Tel. +1 313 577 3339, E-Mail kraft@wayne.edu

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Folia Phoniatr Logop 2012;64:34–47

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Objective: The literature on the genetics of stuttering is reviewed with special reference to the historical development from psychosocial explanations leading up to current biological research of gene identification. Summary: A gradual progression has been made from the early crude methods of counting percentages of stuttering probands who have relatives who stutter to recent studies using entire genomes of DNA collected from each participant. Despite the shortcomings of some early studies, investigators have accumulated a substantial body of data showing a large presence of familial stuttering. This encouraged more refined research in the form of twin studies. Concordance rates among twins were sufficiently high to lend additional support to the genetic perspective of stuttering. More sophisticated aggregation studies and segregation analyses followed, producing data that matched recognized genetic models, providing the final ‘go ahead’ to proceed from the behavior/statistical genetics into the sphere of biological genetics. Recent linkage and association studies have begun to reveal contributing genes to the disorder. Conclusion: No definitive findings have been made regarding which transmission model, chromosomes, genes, or sex factors are involved in the expression of stuttering in the population at large. Future research and clinical implications are discussed.

© 2011 S. Karger AG, Basel


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Published online: November 05, 2011
Issue release date: December 2011

Number of Print Pages: 14
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ISSN: 1021-7762 (Print)
eISSN: 1421-9972 (Online)

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