Acoustic Speech Characteristics and Patient Self-Awareness of Dysarthria in Myotonic Dystrophy type 1
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2024-10-28
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en
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Dysarthria is a common feature in myotonic dystrophy type 1. This study aims to
describe acoustic characteristics of dysarthria in DM1 patients compared to the perceptual
severity of dysarthria and the patient's own opinion. Participants were recruited from the Radboud university medical centre. Dysarthria severity was rated on a severity scale from 0 (no dysarthria) to 5 (very severe dysarthria/anarthria). Acoustic characteristics were derived from spontaneous speech, reading, and maximum performance tasks. The patients judged their speech with a short questionnaire and a visual analogue scale (VAS). Twenty-two patients (9 females) were included, with a mean age of 50. The following acoustic characteristics were deviant from normative values: speech rate, articulation rate, maximum phonation volume, and fundamental frequency range. In more severe dysarthria, speech rate, articulation rate, maximum phonation volume, and vowel articulation decreased. As the perceptual severity increased, the satisfaction and intelligibility score of relatives decreased signifisignificantly. These findings, combined with the results of follow-up studies, can be used to develop morespecific speech therapy interventions.
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