Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Voice Change Associated with Swallowing Disorder Caused by a Stroke After Neuromuscular Electrical Stimulation

뇌졸중으로 인한 삼킴장애 환자의 경부근육전기자극치료에 따른 음성 변화

  • Byeon, Hae-Won (Department of Language Therapy, Daelim University Collage, Institute on Aging, Ajou University Medical Center)
  • 변해원 (대림대학교 언어재활과, 아주대학교의료원 노인보건연구센터)
  • Received : 2012.01.03
  • Accepted : 2012.04.12
  • Published : 2012.04.30
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Abstract

The purpose of this study was to look into changes in voice using acoustic analysis during the process of neuromuscular electrical stimulation targeting dysphagia treatment. Fifteen man with dysphagia caused by stroke was treated neuromuscular electrical stimulation for two months and intensity of voice, $F_0$, Jitter, Shimmer, NNE were measured. The results of this study that improvement in functions of dysphagia and Jitter, Shimmer were stabilized. But there was not significantly changes of $F_0$. NNE was improved after the intervention, but still showed abnormal levels. This result suggests a possibility of effects that Neuromuscular electrical stimulation has on stabilization of Jitter, Shimmer and intensity of voice.

이 연구는 뇌졸중으로 인한 삼킴장애 환자를 대상으로 반복된 경부근육전기자극치료(NMES) 과정에서 나타나는 음성의 변화를 음향음성학적 분석 방법으로 분석하고, NMES 중재가 음성에 미치는 영향을 파악하고자 하였다. 2010년 2월 부터 2011년 3월까지 인천광역시의 2개 병원에서 삼킴장애로 진단을 받은 발성이 가능한 15명의 남성을 대상으로 2개월 동안 반복된 경부근육전기자극치료를 실시하였다. 음성은 강도, 음도($F_0$), 음질(Jitter, Shimmer, NNE; Normalized Noise Energy)을 측정하였고, 중재가 종료된 1주 후에 변화된 음성이 유지되었는지를 분석하였다. 연구결과, NMES 중재 후 대상자의 삼킴 기능 회복과 함께 음성 강도가 향상되었고, 성대 진동의 주기성(Jitter, Shimmer)이 안정되었다(P<0.05). 그러나 음도는 유의한 차이가 없었고, NNE는 중재 후 향상되었지만 여전히 비정상적인 수치를 보였다. 이 결과는 반복된 경부근육전기자극치료가 삼킴 능력의 회복과 함께 음성 강도의 향상 및 성대 진동 주기성의 안정화에 영향을 미칠 수 있는 가능성을 시사한다.

Keywords

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