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• Vol.63 No.8
• CLINICA NEUROL, 63: 532−535, 2023
• Vol.63 No.8 contents

Brief Clinical Note

Abnormal movements “Motare” in Kyudo have the characteristics of task-specific focal dystonia

Taichi Ogiso¹⁾, Yoya Ono, M.D.²⁾, Saiki Suzuki¹⁾ and Takayoshi Shimohata, M.D., Ph.D.²⁾

¹⁾ Gifu University School of Medicine
²⁾ Department of Neurology, Gifu University Graduate School of Medicine

Among the abnormal kyudo movements（“yips”）, “motare” is the inability to release the arrow at the intended timing if aiming the target. We hypothesized that “motare” is a task-specific focal dystonia（TSFD）. We interviewed three participants with “motare,” three participants with “hayake”, and three controls without “motare” nor “hayake”. Moreover, we conducted a surface electromyography（sEMG）examination and found that “motare” was characterized by stereotypy, sensory tricks, and morning benefit; however, these findings were not observed in “hayake”. Abnormal cocontraction of the upper extremity antagonist muscles was observed in one of the three “motare” participants. Overall, these findings suggest that “motare” have the characteristics of TSFD not previously reported.
Full Text of this Article in Japanese PDF (1028K)

(CLINICA NEUROL, 63: 532−535, 2023)
key words: Kyudo, task-specific focal dystonia, surface electromyography, co-contraction, yips

(Received: 4-Feb-23)