Speech characteristics in the congenital and childhood-onset forms of myotonic dystrophy type 1
| Autor: | Åsa Mårtensson, Lotta Sjögreen, Anne-Berit Ekström |
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| Rok vydání: | 2018 |
| Předmět: |
musculoskeletal diseases
congenital hereditary and neonatal diseases and abnormalities Linguistics and Language medicine.medical_specialty Interdental consonant Audiology Intelligibility (communication) medicine.disease Hypernasal speech Myotonic dystrophy Language and Linguistics 030507 speech-language pathology & audiology 03 medical and health sciences Speech and Hearing Dysarthria 0302 clinical medicine Augmentative and alternative communication otorhinolaryngologic diseases medicine Nasalance medicine.symptom 0305 other medical science Psychology 030217 neurology & neurosurgery Nasality |
| Zdroj: | International Journal of Language & Communication Disorders. 53:576-583 |
| ISSN: | 1368-2822 |
| Popis: | Background Myotonic dystrophy type 1 (DM1) is a slowly progressive multi-systemic disease with an autosomal-dominant inheritance caused by a mutation on chromosome 19 (19q13.3). Aims To explore speech characteristics in a group of individuals with the congenital and childhood-onset forms of DM1 in terms of intelligibility, speech-sound production, nasality and compensatory articulation. A further aim was to analyse whether speech characteristics were correlated to subforms of DM1 and if speech outcome could be related to muscle strength. Methods & procedures Fifty native Swedish speakers (7-29 years old) with the congenital and childhood-onset forms of DM1 and 13 healthy controls participated in the study. The intelligibility of spontaneous speech, speech-sound production - single-word and sentence repetition - including percentage consonants correct (PCC) and compensatory articulation, were evaluated by speech-language pathologists from video recordings. A nasometer and lip-force meter were used for objective evaluations of nasality and orofacial strength. Outcomes & results In severe (n = 9) and mild congenital DM1 (n = 13), all participants had impaired intelligibility to some degree, while this applied to 79% of those with childhood DM1 (n = 28). PCC for bilabials were 53.9% in severe congenital DM1, 57.4% in mild congenital DM1 and 85.3% in childhood DM1; the corresponding results for dentals were 69.3%, 59.2% and 87.3%. Bilabials were most often compensated for with interdental or labiodental articulation. Dentals were substituted with interdental articulation. Velars were seldom affected. The mean nasalance score was high in the study group compared with controls and with normative data and the majority had weak lips. Maximum lip force, as well as the mean nasalance score, correlated significantly with the intelligibility score. Conclusions & implications The deviant production of bilabial consonants, interdental articulation and hypernasal speech are characteristic features of dysarthria in congenital and childhood DM1. Dysarthria is more frequent and more severe in congenital DM1 compared with childhood DM1. Most individuals with congenital DM1 and childhood-onset DM1 will need speech therapy from a young age. For some children with incomprehensible speech or severe neurodevelopmental disorders, alternative and augmentative ways of communication will be part of the treatment. |
| Databáze: | OpenAIRE |
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