Oral Articulatory Control in Childhood Apraxia of Speech Purpose The purpose of this research was to examine spatial and temporal aspects of articulatory control in children with childhood apraxia of speech (CAS), children with speech delay characterized by an articulation/phonological impairment (SD), and controls with typical development (TD) during speech tasks that increased in word length. ... Research Article
Research Article  |   August 2015
Oral Articulatory Control in Childhood Apraxia of Speech
 
Author Affiliations & Notes
  • Maria I. Grigos
    New York University
  • Aviva Moss
    New York University
  • Ying Lu
    New York University
  • 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 Maria I. Grigos: maria.grigos@nyu.edu
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Ben A.M. Maassen
    Associate Editor: Ben A.M. Maassen×
  • Copyright © 2015 American Speech-Language-Hearing Association
Article Information
Speech, Voice & Prosodic Disorders / Apraxia of Speech & Childhood Apraxia of Speech / Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   August 2015
Oral Articulatory Control in Childhood Apraxia of Speech
Journal of Speech, Language, and Hearing Research, August 2015, Vol. 58, 1103-1118. doi:10.1044/2015_JSLHR-S-13-0221
History: Received August 15, 2013 , Revised April 25, 2014 , Accepted May 1, 2015
 
Journal of Speech, Language, and Hearing Research, August 2015, Vol. 58, 1103-1118. doi:10.1044/2015_JSLHR-S-13-0221
History: Received August 15, 2013; Revised April 25, 2014; Accepted May 1, 2015
Acknowledgments
This research was supported by National Institute on Deafness and Other Communicative Disorders Grant R03DC009079. The authors acknowledge Julie Case, Hailey Small, Panagiota Tampakis, Penelope Elias, and Jessica Storer for assistance with data collection and processing. We are grateful to the participants and their families for their cooperation and dedication to the project.

Purpose The purpose of this research was to examine spatial and temporal aspects of articulatory control in children with childhood apraxia of speech (CAS), children with speech delay characterized by an articulation/phonological impairment (SD), and controls with typical development (TD) during speech tasks that increased in word length.

Method The participants included 33 children (11 CAS, 11 SD, and 11 TD) between 3 and 7 years of age. A motion capture system was used to track jaw, lower lip, and upper lip movement during a naming task. Movement duration, velocity, displacement, and variability were measured from accurate word productions.

Results Movement variability was significantly higher in the children with CAS compared with participants in the SD and TD groups. Differences in temporal control were seen between both groups of children with speech impairment and the controls with TD during accurate word productions. As word length increased, movement duration and variability differed between the children with CAS and those with SD.

Conclusions These findings provide evidence that movement variability distinguishes children with CAS from speakers with SD. Kinematic differences between the participants with CAS and those with SD suggest that these groups respond differently to linguistic challenges.

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