Examining the effects of Multiple Sclerosis on speech production: Does phonetic structure matter?

Rosen, Kristin M.; Goozee, J. V.; Murdoch, Bruce E.

doi:10.1016/j.jcomdis.2007.03.009

Cited by 33 publications

(25 citation statements)

References 41 publications

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“…The findings of kinematic studies have suggested that neurologic damage results in the reduction in size and speed of speech-related movements [6][7][8] . Parallel findings have been reported in acoustic studies, showing changes in vowel formant frequencies and F2 slopes, reductions in F2 transitions, and increases in segment durations [9][10][11][12][13] . Although changes in speech kinematics are presumed to underlie changes in speech acoustics, studies that link the two in clinical populations have not, to our knowledge, been completed.…”

Section: Introductionsupporting

confidence: 85%

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Tongue Movements and Their Acoustic Consequences in Amyotrophic Lateral Sclerosis

Yunusova

Green

Greenwood

et al. 2012

Folia Phoniatr Logop

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rate. Relations between F2 range and tongue displacement were weaker. F2 slope, displacement, and duration were correlated with speech intelligibility most consistently. Conclusion: Findings suggested that F2 slope is a useful marker for tracking disease progression in ALS. F2 slope reflects changes in tongue function with disease progression and is linked to speech intelligibility. Changes in movement speed, however, might be the earliest sign of disease in the tongue.

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Section: Introductionsupporting

confidence: 85%

“…F2 slope emerged as one of those aspects in several earlier studies [9,11] . In our study, the correlations between F2 slopes and speech intelligibility were moderate at best and varied for different contexts, in agreement with previous research.…”

Section: Correlates Of Speaking Rate and Intelligibility Decline In Alsmentioning

confidence: 91%

Tongue Movements and Their Acoustic Consequences in Amyotrophic Lateral Sclerosis

Yunusova

Green

Greenwood

et al. 2012

Folia Phoniatr Logop

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“…This approach also allows extreme instantaneous slope values, such as maxima, to be identified. A recent study of Multiple Sclerosis (MS) further concluded that extreme F2 slope measures were more sensitive to mild dysarthria than average slope measures [8]. Only one dysarthria study has reported extreme F2 slope metrics, however, and additional studies obviously are needed before drawing strong conclusions regarding the utility of extreme F2 slope metrics in mild dysarthria.…”

Section: Introductionmentioning

confidence: 99%

Acoustic and Perceptual Consequences of Clear and Loud Speech

Tjaden

Richards²,

Kuo³

et al. 2013

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Objective: Several issues concerning F2 slope in dysarthria were addressed by obtaining speech acoustic measures and judgments of intelligibility for sentences produced in Habitual, Clear and Loud conditions by speakers with Parkinson's disease (PD) and healthy controls. Patients and Methods: Acoustic measures of average and maximum F2 slope for diphthongs, duration and intensity were obtained. Listeners judged intelligibility using a visual analog scale. Differences in measures among groups and conditions as well as relationships among measures were examined. Results: Average and maximum F2 slope metrics were strongly correlated, but only average F2 slope consistently differed among groups and conditions, with shallower slopes for the PD group and steeper slopes for Clear speech versus Habitual and Loud. Clear and Loud speech were also characterized by lengthened durations, increased intensity and improved intelligibility versus Habitual. F2 slope and intensity were unrelated, and F2 slope was a significant predictor of intelligibility. Conclusion: Average diphthong F2 slope was more sensitive than maximum F2 slope to articulatory mechanism involvement in mild dysarthria in PD. F2 slope holds promise as an objective measure of treatment-related changes in the articulatory mechanism for therapeutic techniques that focus on articulation.

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“…Many phonetic contexts, including consonant-vowel transitions and diphthongs require large changes in vocal tract configuration and, thus, large F2 transitions. Prior research has suggested that such phonetic contexts may be more sensitive to dysarthria than overall measures of F2 range in adult speakers with mild dysarthria (Rosen, Goozée & Murdoch, 2008), as phonemes requiring larger vocal tract excursions have greater speech motor demands and thus may be more likely to be affected by speech motor impairment (SMI). F2 range of segments requiring large changes in vocal tract configuration can be interpreted to reflect precision of executing these phonemes, and may or may not be associated with a global reduction in F2 range.…”

Section: Acoustic Indicators Of Articulatory Imprecisionmentioning

confidence: 99%

Range and Precision of Formant Movement in Pediatric Dysarthria

Allison

Annear

Policicchio

et al. 2017

J Speech Lang Hear Res

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Purpose: This study aimed to improve understanding of speech characteristics associated with dysarthria in children with cerebral palsy by analyzing segmental and global formant measures in single-word and sentence contexts. Method: Ten 5-year-old children with cerebral palsy and dysarthria and 10 age-matched, typically developing children participated in this study. Vowel space area and second formant interquartile range were measured from children's elicited productions of single words and sentences. Results: Results showed that the children with dysarthria had significantly smaller vowel space areas than typically developing children in both word and sentence contexts; however, overall ranges of second formant movement did not differ between groups in word or sentence contexts. Additional analysis of single words revealed that, compared to typical children, children with dysarthria had smaller second formant interquartile ranges in single words with phonetic contexts requiring large changes in vocal tract configuration, but not in single words with monophthongs. Conclusions: Results of this study suggest that children with dysarthria may not have globally reduced ranges of articulatory movement compared to typically developing peers; however, they do exhibit reduced precision in producing phonetic targets.

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Examining the effects of Multiple Sclerosis on speech production: Does phonetic structure matter?

Cited by 33 publications

References 41 publications

Tongue Movements and Their Acoustic Consequences in Amyotrophic Lateral Sclerosis

Tongue Movements and Their Acoustic Consequences in Amyotrophic Lateral Sclerosis

Acoustic and Perceptual Consequences of Clear and Loud Speech

Range and Precision of Formant Movement in Pediatric Dysarthria

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