Relationship between kinematics, F2 slope and speech intelligibility in dysarthria due to cerebral palsy

Panying Rong, Torrey Loucks, Heejin Kim, Mark Hasegawa-Johnson

Research output: Contribution to journalArticlepeer-review


A multimodal approach combining acoustics, intelligibility ratings, articulography and surface electromyography was used to examine the characteristics of dysarthria due to cerebral palsy (CP). CV syllables were studied by obtaining the slope of F2 transition during the diphthong, tonguejaw kinematics during the release of the onset consonant, and the related submental muscle activities and relating these measures to speech intelligibility. The results show that larger reductions of F2 slope are correlated with lower intelligibility in CP-related dysarthria. Among the three speakers with CP, the speaker with the lowest F2 slope and intelligibility showed smallest tongue release movement and largest jaw opening movement. The other two speakers with CP were comparable in the amplitude and velocity of tongue movements, but one speaker had abnormally prolonged jaw movement. The tonguejaw coordination pattern found in the speakers with CP could be either compensatory or subject to an incompletely developed oromotor control system.

Original languageEnglish (US)
Pages (from-to)806-822
Number of pages17
JournalClinical Linguistics and Phonetics
Issue number9
StatePublished - Sep 2012


  • Dysarthria
  • Electromagnetic articulography
  • Electromyography
  • F2 slope
  • Kinematics

ASJC Scopus subject areas

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


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