The Relationship between Articulation Function Evaluated by Oral Diadochokinesis and Speech Mechanism Disorder

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  • SUGIMOTO Tomoko
    Division of Preventive Dentistry, Department of Oral Health Science, Graduate School of Medical and Dental Sciences, Niigata University
  • YOSHIHARA Akihiro
    Division of Oral Science for Health Promotion, Department of Oral Health and Welfare, Niigata University Graduate School of Medical and Dental Sciences
  • ITO Kayoko
    Division of Geriatric Dentistry, Niigata University Medical and Dental Hospital
  • MIYAZAKI Hideo
    Division of Preventive Dentistry, Department of Oral Health Science, Graduate School of Medical and Dental Sciences, Niigata University

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Other Title
  • オーラルディアドコキネシスを用いた構音機能の評価と発声発語器官障害との関連
  • オーラルディアドコキネシス オ モチイタ コウオン キノウ ノ ヒョウカ ト ハッセイ ハツゴ キカン ショウガイ ト ノ カンレン

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Abstract

<p>　The present study aimed to clarify the relationship between speech mechanism impairment and articulation function using oral diadochokinesis (OD). Subjects comprised 29 patients (23 men, 6 women; mean age, 68.8±9.3 years) undergoing rehabilitation due to dysarthria who consented to participate. In addition to measuring the OD rate, speech mechanism assessment and three other tests were simultaneously conducted. Multiple linear regression analysis was used to investigate the relationship between the OD rate and results of speech and speech mechanism assessment and presence or absence of orofacial, eating, or deglutition disorders.</p><p>　The following items demonstrated a significant relationship with all of the the OD sounds /pa/ /ta/ /ka/. The speech assessment parameters of speech intelligibility and degree of speech naturalness revealed that the higher the OD rate, the more patients’ speech was ‘well understood’ and ‘completely natural’ (standard partial regression coefficient (β)=0.42-0.71; p<0.001-0.037). The longest exhalation and maximum phonation time of the speech mechanism parameters showed that the higher the OD rate, the longer the duration (β=0.46-0.62; p=0.002-0.021). Furthermore, higher scores for tongue protrusion and elevation were associated with a higher OD rate (β=0.46-0.52; p=0.007-0.020). Eating and deglutition disorders showed a significant correlation with /ta/ (β=0.49; p=0.012) and /ka/ (β=0.54; p=0.005).</p><p>　The present findings suggest a relationship between dysarthria and speech, respiration, phonation, and eating and deglutition disorders.</p>

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