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Spastic dysphonia is a very rare condition. It is, however, less rare in the United States than in Japan. One of the present authors (M. Hirano) had an opportunity to review 37 spastic dysphonia patients at Lenox Hill Hospital in New York with two American clinicians, the other two authors. The purpose of this paper is to provide information on some aspects of this enigmatic voice disorder for voice specialists in Japan. The results are summarized as follows: (1) In a total of 37 patients, 24 had psychogenic and/or somatic factors which the patients thought had some relationship to the onset of their voice disorders. (2) The less the communicative function was associated with phonation, the less the voice spasticity tended to be. (3) The more different from normal the mode of vocal fold vibration was, the less the voice spasticity tended to be. (4) Elimination of auditory feedback resulted in a decrease in voice spasticity in a few selected patients.
耳鼻咽喉科臨床学会の論文