Vowel Distortion in Traumatic Dysarthria: Lip Rounding versus Tongue Advancement

Ziegler, Wolfram; D, von Cramon

doi:10.1159/000261698

Cited by 12 publications

(2 citation statements)

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“…Several studies have reported acoustic analysis of TBI-induced dysarthria [16][17][18][19][20][21][22][23][24][25][26][27][28] . However, most of these studies were limited to quasi-speech samples, such as sustained vowel phonation, sustained fricatives, fast-rate diphthongs, CVC syllables in a carrier sentence and syllable AMR (alternating motion rate, i.e.…”

Section: Introductionmentioning

confidence: 99%

Dysarthria in Traumatic Brain Injury: A Breath Group and Intonational Analysis

Wang

Kent

Duffy

et al. 2005

Folia Phoniatr Logop

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Prosodic abnormality is a common feature in the dysarthrias associated with traumatic brain injury (TBI), but very few analytic studies have been reported on the nature of the prosodic disturbances. This study, based on analyses of conversational and sentence speech samples, reports on breath group structure and its temporal and intonational components for 12 subjects with TBI and 8 healthy controls. It introduces the method of f₀ close-copy stylization to the study of intonational patterns in dysarthria. The subjects with TBI had reduced mean length and variation of breath groups along with frequent inappropriate locations of breath pause and lengthy and variable breath pauses. Prosodic features that were preserved in the subjects with TBI were phrase final lengthening, f₀ downtrend and a relatively normal f₀ distribution. However, these subjects had reduced speaking and articulation rates, reduced f₀ movement and reduced f₀ slope. The phrase final lengthening and f₀ downtrend phenomena, which can serve as prosodic cues of syntactic boundary, appear to be robust features of speech production, but the dynamic features of f₀ control were more vulnerable to the neurological damage. This study indicates the importance of breath group management in TBI-induced dysarthria and the need to use methods such as those used in this study for large-scale investigations that examine cognitive, linguistic and motoric factors that conspire to reduce communicative efficiency.

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Section: Introductionmentioning

confidence: 99%

Dysarthria in Traumatic Brain Injury: A Breath Group and Intonational Analysis

Wang

Kent

Duffy

et al. 2005

Folia Phoniatr Logop

View full text Add to dashboard Cite

show abstract

“…The acoustic consequences of such vowel production deficits have been widely investigated (e.g., Y.-J. Kim, Weismer, Kent, & Duffy, 2009; Rosen, Goozee, & Murdoch, 2008; Turner, Tjaden, & Weismer, 1995; Watanabe, Arasaki, Nagata, & Shouji, 1994; Weismer, Jeng, Laures, Kent, & Kent, 2001; Weismer & Martin, 1992; Ziegler & von Cramon, 1983a, 1983b, 1986) and are summarized by K. Kent, Weismer, Kent, Vorperian, and Duffy (1999) as including centralization of formant frequencies, reduction of vowel space area (i.e., mean working vowel space), and abnormal formant frequencies for both high and front vowels.…”

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confidence: 99%

Vowel Acoustics in Dysarthria: Speech Disorder Diagnosis and Classification

Lansford

Liss

2014

J Speech Lang Hear Res

117

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Purpose The purpose of this study was to determine the extent to which vowel metrics are capable of distinguishing healthy from dysarthric speech and among different forms of dysarthria. Method A variety of vowel metrics were derived from spectral and temporal measurements of vowel tokens embedded in phrases produced by 45 speakers with dysarthria and 12 speakers with no history of neurological disease. Via means testing and discriminant function analysis (DFA), the acoustic metrics were used to (a) detect the presence of dysarthria and (b) classify the dysarthria subtype. Results Significant differences between dysarthric and healthy control speakers were revealed for all vowel metrics. However, the results of the DFA demonstrated some metrics (particularly metrics that capture vowel distinctiveness) to be more sensitive and specific predictors of dysarthria. Only the vowel metrics that captured slope of the second formant (F2) demonstrated between-group differences across the dysarthrias. However, when subjected to DFA, these metrics proved unreliable classifiers of dysarthria subtype. Conclusion The results of these analyses suggest that some vowel metrics may be useful clinically for the detection of dysarthria but may not be reliable indicators of dysarthria subtype using the current dysarthria classification scheme.

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Anticipatory coarticulation in a patient with apraxia of speech

Ziegler

Cramon

1985

Brain and Language

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Vowel Distortion in Traumatic Dysarthria: Lip Rounding versus Tongue Advancement

Cited by 12 publications

References 4 publications

Dysarthria in Traumatic Brain Injury: A Breath Group and Intonational Analysis

Dysarthria in Traumatic Brain Injury: A Breath Group and Intonational Analysis

Vowel Acoustics in Dysarthria: Speech Disorder Diagnosis and Classification

Anticipatory coarticulation in a patient with apraxia of speech

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