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Speech characteristics, maximum tongue pressure, and acoustic indices related to lingual function in amyotrophic lateral sclerosis:Differences between the bulbar paralysis-type and the tetraplegia-type Yohei Tsujisawa 1 , Makoto Kariyasu 2,3 1Department of Rehabilitation, Hokkaido University Hospital 2Human Communication Science Laboratories 3Institute for Junwa Rehabilitation Foundation Keyword: 筋萎縮性側索硬化症 , 球麻痺型 , 四肢麻痺型 , 最大舌圧 , 舌に関連する音響指標 , amyotrophic lateral sclerosis , ALS , bulbar paralysis-type , tetraplegia-type , maximum tongue pressure , tongue-related acoustic indices pp.13-25
Published Date 2023/3/15
DOI https://doi.org/10.11477/mf.6001200410

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 We examined whether there were differences in speech features, speech functions, maximum tongue pressure, and acoustic indices related to lingual function in two groups of patients with amyotrophic lateral sclerosis (ALS) who completed a comprehensive speech assessment within one month of the day of diagnosis. A retrospective chart review and auditory-perceptual and acoustic analyses of speech samples were performed for the bulbar paralysis-type ALS patients (N=17) and the tetraplegia-type ALS patients (N=9). Many bulbar paralysis-type ALS patients exhibited abnormal speech features including mono-pitch, imprecise consonants, slow rate of speech, discontinuous segment sequences, hypernasality, rough voice, inconsistent segment duration, together with bizarreness. Compared with the tetraplegia-type ALS group, the bulbar paralysis-type group showed significantly lower speech intelligibility and speaking rate, less magnitude of maximum tongue pressure, lower F2 for /i/ in sustained vowel phonation and oral reading, and lower F2 slope for /ai/ in oral reading. The findings suggest that the lingual weakness associated with bulbar palsy is closely related to abnormal speech features and reduced speech functions in ALS. Thus, a comprehensive speech assessment may be useful for making an early diagnosis of ALS and for understanding the state and progression of the disease and physical conditions.


Copyright © 2023, Japanese Association of Speech-Language-Hearing Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 1349-5828 日本言語聴覚士協会

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