Evidence for a familial speech sound disorder subtype in a multigenerational study of oral and hand motor sequencing ability

Beate Peter, Wendy H. Raskind

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Purpose: To evaluate phenotypic expressions of speech sound disorder (SSD) in multigenerational families with evidence of familial forms of SSD. Method: Members of five multigenerational families (N = 36) produced rapid sequences of monosyllables and disyllables and tapped computer keys with repetitive and alternating movements. Results: Measures of repetitive and alternating motor speed were correlated within and between the two motor systems. Repetitive and alternating motor speeds increased in children and decreased in adults as a function of age. In two families with children who had severe speech deficits consistent with disrupted praxis, slowed alternating, but not repetitive, oral movements characterized most of the affected children and adults with a history of SSD, and slowed alternating hand movements were seen in some of the biologically related participants as well. CONCLUSION:: Results are consistent with a familial motor-based SSD subtype with incomplete penetrance, motivating new clinical questions about motor-based intervention not only in the oral but also the limb system.

Original languageEnglish (US)
Pages (from-to)145-167
Number of pages23
JournalTopics in Language Disorders
Volume31
Issue number2
DOIs
StatePublished - Apr 2011
Externally publishedYes

Keywords

  • common disease/common variant
  • common disease/rare variant
  • disorder subtype
  • familial phenotype
  • motor sequencing
  • motor speed
  • speech sound disorder

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing

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