Range and Precision of Formant Movement in Pediatric Dysarthria Purpose This study aimed to improve understanding of speech characteristics associated with dysarthria in children with cerebral palsy by analyzing segmental and global formant measures in single-word and sentence contexts. Method Ten 5-year-old children with cerebral palsy and dysarthria and 10 age-matched, typically developing children participated in this ... Research Article
Research Article  |   July 12, 2017
Range and Precision of Formant Movement in Pediatric Dysarthria
 
Author Affiliations & Notes
  • Kristen M. Allison
    Department of Communication Sciences and Disorders and the Waisman Center, University of Wisconsin–Madison
  • Lucas Annear
    Department of Communication Sciences and Disorders and the Waisman Center, University of Wisconsin–Madison
  • Marisa Policicchio
    Department of Communication Sciences and Disorders and the Waisman Center, University of Wisconsin–Madison
  • Katherine C. Hustad
    Department of Communication Sciences and Disorders and the Waisman Center, University of Wisconsin–Madison
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Kristen M. Allison, who is at MGH Institute of Health Professions, Boston, MA: kallison1@mghihp.edu
  • Editor: Julie Liss
    Editor: Julie Liss×
  • Associate Editor: Maria Grigos
    Associate Editor: Maria Grigos×
Article Information
Speech, Voice & Prosodic Disorders / Dysarthria / Hearing & Speech Perception / Acoustics / Speech / Research Articles
Research Article   |   July 12, 2017
Range and Precision of Formant Movement in Pediatric Dysarthria
Journal of Speech, Language, and Hearing Research, July 2017, Vol. 60, 1864-1876. doi:10.1044/2017_JSLHR-S-15-0438
History: Received December 21, 2015 , Revised June 17, 2016 , Accepted February 8, 2017
 
Journal of Speech, Language, and Hearing Research, July 2017, Vol. 60, 1864-1876. doi:10.1044/2017_JSLHR-S-15-0438
History: Received December 21, 2015; Revised June 17, 2016; Accepted February 8, 2017

Purpose This study aimed to improve understanding of speech characteristics associated with dysarthria in children with cerebral palsy by analyzing segmental and global formant measures in single-word and sentence contexts.

Method Ten 5-year-old children with cerebral palsy and dysarthria and 10 age-matched, typically developing children participated in this study. Vowel space area and second formant interquartile range were measured from children's elicited productions of single words and sentences.

Results Results showed that the children with dysarthria had significantly smaller vowel space areas than typically developing children in both word and sentence contexts; however, overall ranges of second formant movement did not differ between groups in word or sentence contexts. Additional analysis of single words revealed that, compared to typical children, children with dysarthria had smaller second formant interquartile ranges in single words with phonetic contexts requiring large changes in vocal tract configuration, but not in single words with monophthongs.

Conclusions Results of this study suggest that children with dysarthria may not have globally reduced ranges of articulatory movement compared to typically developing peers; however, they do exhibit reduced precision in producing phonetic targets.

Acknowledgments
This study was funded by Grants R01DC009411 and 1F31DC013925-01 from the National Institute on Deafness and Other Communication Disorders. Support was also provided by the Waisman Center core grant, P30HD03352, from the National Institute of Child Health and Human Development, National Institutes of Health. We would like to thank the children and families who participated in this study. We would also like to thank Dr. Gary Weismer for his input and advice.
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