An acoustic measure of lexical stress differentiates aphasia and aphasia plus apraxia of speech after stroke

Vergis, Marianne K.; Ballard, Kirrie J.; Duffy, Joseph R.; McNeil, Malcolm R.; Scholl, Dominique I.; Layfield, Claire

doi:10.1080/02687038.2014.889275

Cited by 46 publications

(48 citation statements)

References 59 publications

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“…The good diagnostic discriminative value of the PVI measure in this study is consistent with findings for stroke-induced aphasia with versus without AOS (Ballard et al ., 2016; Vergis et al ., 2014), and for speakers with lvPPA and nfPPA in which PVI was a strong predictor of AOS (Ballard et al ., 2014). Our finding that abnormal PVI values were primarily due to disproportionate lengthening of vowels in the word-initial weak syllable as opposed to lengthening of the vowel in the subsequent stressed syllable also concurs with those studies’ findings.…”

Section: Discussionmentioning

confidence: 99%

“…For catastrophe , normal responses should have negative PVI values because the first syllable is unstressed (shorter) and the second syllable is stressed (longer). Based on PVI findings for speakers with stroke-related AOS and nfPPA with frequent co-occurring AOS (Ballard et al ., 2014; Vergis et al ., 2014), and two PPAOS speakers (Duffy et al ., 2015), we hypothesized that PPAOS speakers would maintain the stress distinction between the two syllables but that the distinction would be less than that achieved by Control, agPPA and lvPPA participants who presumably have no problems with lexical stress.…”

Section: Methodsmentioning

confidence: 99%

“…Acoustic measures have potential as markers to improve diagnostic reliability and quantify features of AOS, as demonstrated in studies of stroke-induced AOS in which acoustic measures have quantified slow rate, syllable segmentation, equalized stress, and voicing abnormalities (e.g., Ballard et al ., 2016; Haley et al ., 2012; Kent & McNeil, 1987; Rogers & Storkel, 1999; Vergis et al ., 2014; Ziegler & von Cramon, 1986). Acoustic measures have also been sensitive to temporal abnormalities in speakers with nfPPA, and to differences between groups with nfPPA versus lvPPA in which the nfPPA group included at least some speakers with AOS (Ash et al, 2009; Ballard et al ., 2014; Code, Ball, Tree, & Dawe, 2013; Knibb, Woolams, Hodges, & Patterson, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Temporal acoustic measures distinguish primary progressive apraxia of speech from primary progressive aphasia

et al. 2017

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The purpose of this study was to determine if acoustic measures of duration and syllable rate during word and sentence repetition, and a measure of within-word lexical stress, distinguish speakers with primary progressive apraxia of speech (PPAOS) from nonapraxic speakers with the agrammatic or logopenic variants of primary progressive aphasia (PPA), and control speakers. Results revealed that the PPAOS group had longer durations and reduced rate of syllable production for most words and sentences, and the measure of lexical stress. Sensitivity and specificity indices for the PPAOS versus the other groups were highest for longer multisyllabic words and sentences. For the PPAOS group, correlations between acoustic measures and perceptual ratings of AOS were moderately high to high. Several temporal measures used in this study may aid differential diagnosis and help quantify features of PPAOS that are distinct from those associated with PPA in which AOS is not present.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temporal acoustic measures distinguish primary progressive apraxia of speech from primary progressive aphasia

et al. 2017

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“…The PVI formula used was: PVI = 100 × (d1 − d2)/ ((d1 + d2)/2), where d is duration of the first or second vowel in a word of two or more syllables (Ballard et al, 2014; Vergis et al, 2014). PVI values closer to zero are consistent with more equalized stress between compared syllables/vowels.…”

Section: Methodsmentioning

confidence: 99%

“…Although only a single case report has measured temporal aspects of speech production in people with PPAOS (Laganaro et al, 2012), it has been shown that some acoustic measures differentiate patients with aphasia from those with aphasia plus AOS due to stroke (e.g., Rogers, 1997; Vergis et al, 2014), and distinguish among subtypes of PPA (Ballard et al, 2014). Most pertinent to the current study, Ballard et al (2014) found that a measure of relative vowel duration differentiated patients with the agrammatic variant of PPA (70% of whom had AOS) from control subjects and patients with the logopenic variant of PPA, and that the acoustic distinctions were in agreement with the clinical distinctions made by expert judges.…”

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confidence: 99%

Primary Progressive Apraxia of Speech: Clinical Features and Acoustic and Neurologic Correlates

Duffy

Strand

Clark

et al. 2015

Am J Speech Lang Pathol

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Purpose This study summarizes two illustrative cases of a neurodegenerative speech disorder, primary progressive apraxia of speech (PPAOS), as a vehicle for providing an overview of the disorder and an approach to describing and quantifying its perceptual features and some of its temporal acoustic attributes. Method Two individuals with PPAOS underwent speech-language and neurologic evaluations on two occasions, ranging from 2 to 7.5 years post onset. Performance on several tests, tasks and rating scales, as well as several acoustic measures, were compared over time within and between cases. Acoustic measures were compared to performance of control speakers. Results Both cases initially presented with AOS as the only or predominant sign of disease, and without aphasia or dysarthria. The presenting features and temporal progression were captured in an AOS Rating Scale, an Articulation Error Score, and temporal acoustic measures of utterance duration, syllable rates per second, rates of speech-like alternating motion and sequential motion rates, and a pairwise variability index measure. Conclusions AOS can be the predominant manifestation of neurodegenerative disease. Clinical ratings of its attributes and acoustic measures of some of its temporal characteristics can support its diagnosis and help quantify its salient characteristics and progression over time.

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Linking motor speech function and dementia

Poole

Vogel

2020

Genetics, Neurology, Behavior, and Diet in Dementia

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An acoustic measure of lexical stress differentiates aphasia and aphasia plus apraxia of speech after stroke

Cited by 46 publications

References 59 publications

Temporal acoustic measures distinguish primary progressive apraxia of speech from primary progressive aphasia

Temporal acoustic measures distinguish primary progressive apraxia of speech from primary progressive aphasia

Primary Progressive Apraxia of Speech: Clinical Features and Acoustic and Neurologic Correlates

Linking motor speech function and dementia

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