Cortical dysfunction of the supplementary motor area in a spasmodic dysphonia patient

Shigeru Hirano, Hisayoshi Kojima, Yasushi Naito, Ichiro Tateya, Kazuhiko Shoji, Ken Ichi Kaneko, Masato Inoue, Sadahiko Nishizawa, Junji Konishi

研究成果: Article査読

17 被引用数 (Scopus)


The etiology of spasmodic dysphonia (SD) is still unknown. In the present study, cortical function of a 59-year-old male patient with adductor type SD was examined during phonation with positron emission tomography (PET). Magnetic resonance imaging showed no organic abnormality in the brain. However, PET showed remarkable activities during phonation in the left motor cortex, Broca's area, the cerebellum, and the auditory cortices, whereas the supplementary motor area (SMA) was not activated. The SMA is known to function for motor planning and programming and is usually activated in normal phonation. Several previous reports have shown that the damage of the SMA caused a severe disturbance of voluntary vocalization. In the present case, it was suggested that the functional deficit of the SMA might be related to SD.

ジャーナルAmerican Journal of Otolaryngology - Head and Neck Medicine and Surgery
出版ステータスPublished - 05-2001

All Science Journal Classification (ASJC) codes

  • Otorhinolaryngology

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