Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics (대한후두음성언어의학회지)

The Korean Society of Laryngology, Phoniatrics and Logopedics. (대한후두음성언어의학회)
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A Case of Mutational Falsetto with Marked Contraction of Suprahyoid Muscles Treated with Botulinum Toxin

설골상근의 과도수축을 동반한 변성발성장애환자에 대한 보툴리눔 독소 주입 치료 1례

  • 최홍식 (연세대학교 의과대학 이비인후과학교실, 음성언어의학연구소) ;
  • 정유삼 (연세대학교 의과대학 이비인후과학교실, 음성언어의학연구소) ;
  • 김원석 (연세대학교 의과대학 이비인후과학교실, 음성언어의학연구소) ;
  • 표화영 (연세대학교 의과대학 이비인후과학교실, 음성언어의학연구소) ;
  • 이경아 (연세대학교 의과대학 이비인후과학교실, 음성언어의학연구소)
  • Published : 1997.04.01
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Abstract

The mutational falsetto is failure to change from the higher pitched voice of preadolescence to the lower pitched voice of adolescence and adulthood. The one of characteristic findings is contraction of suprahyoid muscles. The large majority of young men with inappropriately high voice have excellent voice therapy prognosis. We have experienced one case of mutational falsetto treated with botulinum toxin injection on suprahyoid muscles. His suprahyoid muscles are contracted markedly simultaneously with each phonation. fundamental frequency$(F_0)$ of his vowel phonation was 332Hz. Extensive voice therapy including manual compression of thyroid notch was ineffective. Forty units of Botox$^{\circledR}$ was injected under the EMG-guidance(20U bilaterally). At seven days post-injection, his voice changed lower than before and at 40 days after procedure, his $F_0$ was 126Hz.

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