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2001 Fiscal Year Final Research Report Summary

THE RELATIONSHIP BETWEEN THE INTENSITY AND THE MASS OF THE VIBRATING PART IN PATHOLOGIC LARYNGES

Research Project

Project/Area Number 12671661
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Otorhinolaryngology
Research InstitutionSHIGA UNIVERSITY OF MEDICAL SCIENCE

Principal Investigator

YAZAWA Yoshiro  Shiga University of Medical Science, Otolaryngology, Associate Professor, 医学部, 助教授 (60127040)

Co-Investigator(Kenkyū-buntansha) KATAOKA Hideyuki  Shiga University of Medical Science, Otolaryngology, Research Associates, 医学部, 助手 (00224436)
Project Period (FY) 2000 – 2001
Keywordsfundamental frequency / transglottal pressure / phonation / rubber model of vibration / vocal cord / vibration
Research Abstract

We previously described the relationship between transglottal pressure and the fundamental frequency of phonation (Fo) in normal subjects. The change in Fo per unit change in transglottal pressure (dF/dP) shows a nonlinear or V-shaped relation to Fo, When Fo is increased from low to high within a modal register, the values for dF/dP fall until FO reaches values of 200 to 250 Hz. The values for dF/dP increase when these frequencies are exceeded.
We hypothesize that the at a lower Fo, the elongation of the vibrating part, and at a higher Fo, the restriction of the vibrating part would be responsible for the V-shaped relation between dF/dP and Fo. The dog experiments performed in this study supported this hypothesis. The rubber model experiments performed in this study also supported this hypothesis. The vocal fold dehydration lowered the values for dF/dP in a lower Fo, resulting in relatively flat V-shape. This suggests that the strategy for raising Fo would be altered by the dehydration.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Kataoka K., Kitajima K, Owaki S: "Effect of taransglottal pressure on fundamental frequency of phonation : Study with a rubber model"Ann Otol Rhinol Laryngol. 110. 56-62 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Suzuki M, Kitano H, Kitanishi T, Itou R, Shiino A, Nishida Y, Yazwa Y, Oawa F, Kitajima K: "Cortical and subcortical activation with monaural monosyllabic stimulation by functional MRI"Hearing Research. 163. 37-45 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tanaka K., Kitajima K., Tanaka H.: "Relationship between transglottal pressure and fundamental frequency of phomation, with effects of dehadration produced by atropine, in healthy volunteers"Ann Otol Rhinol Laryngol. 110. 1066-1071 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yamana T, Kitano H, Hanamitsu M, Kitajima K.: "Clinical outcome of laryngotracheal separation for intractable aspiration pneumonia"ORL. 63. 321-324 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kataoka K., Kitajima K: "Effects of length and depth of vibration of the vocal folds on the relationship between transglottal pressure and fundamental frequency of phonation in canine larynges"Ann Otol Rhinol Laryngol. 110. 556-561 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kataoka K., Kitajima .K, Owaki S.: "Effect of taransglottal pressure on fundamental frequency of phonation : Study with a rubber model"Ann Otol Rhinol Laryngol. 110. 56-62 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Suzuki M., Kitano H., Kitanishi T., Itou R., Shiino A., Nishida Y., Yazwa Y., Ogawa F., Kitajima K.: "Cortical and subcortical activation with monaural monosyllabic stimulation by functional MRI"Hearing Research. 163. 37-45 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanaka K., Kitajima K., Tanaka H.: "Relationship between transglottal pressure and fundamental frequency of phomation, with effects of dehadration produced by atropine, in healthy volunteers"Ann Otol Rhinol Laryngol.. 110. 1066-1071 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yamana T., Kitano H., Hanamitsu M., Kitajima K.: "Clinical outcome of laryngotracheal separation for intractable aspiration pneumonia"ORL. 63. 321-324 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kataoka K., Kitajima K.: "Effects of length and depth of vibration of the vocal folds on the relationship between transglottal pressure and fundamental frequency of phonation in canine larynges"Ann Otol Rhinol Laryngol. 110. 556-561 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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