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Acoustic and Auditory-Perceptual Characteristics of Korean Stop Consonants in Patients with Idiopathic Parkinson’s Disease and Cerebellar-Multiple System Atrophy

Other Titles
 특발성 파킨슨병과 소뇌성 다계통위축증 환자 간의 조음 파열음 비교: 음향학적 및 청지각적 특성 
 Bo Mi Kim  ;  Seok Chae Rhee  ;  Sung Rae Cho  ;  HyangHee Kim 
 Communication Sciences & Disorders, Vol.25(4) : 954-965, 2020-12 
Journal Title
 Communication Sciences & Disorders 
Issue Date
Parkinson’s disease (PD) ; Cerebellar variant of multiple system atrophy (MSA-C) ; Korean stops ; Closure duration ; Aspiration duration
Objectives: This study aims to investigate Korean stop consonant production in patients with idiopathic Parkinson’s disease (IPD) and Multiple System Atrophy-cerebellar variant (MSA-C) in aiding in differentiating the two types of diseases with Parkinsonism in common. Method: We included a total of 30 subjects (M:F=15:15) (10 with IPD, 10 with MSA-C, 10 age-matched normals). The subjects were to produce nine Korean stops, /p/, /p’/, /ph/, /t/, /t’/, /th/, /k/, /k’/, /kh/ embedded in VCV contexts. The speech data were analyzed with the Praat program, and the analyses included length and ratio of closure sections and aspiration sections; speech rate, variability across repeated measurements; and error patterns based on auditory-perceptual evaluation. Results: The MSA-C group demonstrated a significantly longer duration than IPD and normal control groups in closure and aspiration sections in seven and two consonants, respectively. Within the combined closure and aspiration sections, the IPD group showed a significantly higher aspiration duration ratio for all the aspirated consonants /ph/, /th/, /kh/ than MSA-C and normal control groups. The MSA-C group frequently manifested substitution errors of lax consonants with tense or aspirated consonants. The IPD group substituted dental plosives with velar plosives. Conclusion: Difficulty in coordinating between the laryngeal and articulatory gestures in MSA-C and IPD groups is differentially manifested in absolute and relative measures of duration of closure and aspiration segments in stop consonants. In addition, the reduced laryngeal-articulatory movements appeared auditory-perceptually as erroneous substitutions of lax consonants with tense or aspirated consonants. Further studies are warranted to investigate more diverse severities of patients with high volume recruitment.
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1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hyang Hee(김향희) ORCID logo https://orcid.org/0000-0003-4949-2512
Cho, Sung-Rae(조성래) ORCID logo https://orcid.org/0000-0003-1429-2684
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