Correlation between vowel centralisation and incomplete stop articulation in individuals with traumatic brain injury

Monika Połczyńska, Yishai Tobin, Shimon Sapir

Research output: Contribution to journalReview articlepeer-review

Abstract

Traumatic brain injury (TBI) often results in dysarthria, a motor speech disorder. Two processes often linked with TBI dysarthria are vowel centralisation and incomplete stop articulation. It is not clear to what extent these two processes are interrelated and to what extent they might serve as indices of the severity of dysarthria secondary to TBI. The purpose of this study is to test the hypothesis that patients who centralise vowels will also have difficulties producing stop consonants with complete stricture. Polish dysarthric speakers post TBI (n=6) and ten age-matched healthy controls with normal speech (n=10) performed the Polish Dysarthria Test for TBI Patients (PDTTP) (Połczyńska-Fiszer and Pufal 2006). Three of the TBI subjects had moderate dysarthria and three mild dysarthria. The test investigates phonemes in isolation as well as in diverse phonetic contexts in different elicitation tasks, including spontaneous speech. The data from the PDTTP were transcribed phonetically and analysed acoustically. Vowel centralisation and incomplete stop articulation appear to be strongly correlated (r=0.90). It was found that the degree of TBI dysarthria correlates with the frequency of occurrence of these two processes. Thus, the two processes may serve as important indices of severity of dysarthria in TBI.

Original languageEnglish
Pages (from-to)281-299
Number of pages19
JournalPoznan Studies in Contemporary Linguistics
Volume45
Issue number2
DOIs
StatePublished - 1 Jun 2009
Externally publishedYes

Keywords

  • Dysarthria
  • Speech acoustics
  • Traumatic Brain Injury
  • Underacticulation

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language

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