ヤマナカ ケンタロウ    YAMANAKA Kentarou
   山中 健太郎
   所属
食健康科学部 健康デザイン学科
 
生活機構研究科 生活科学研究専攻
 
生活機構研究科 生活機構学専攻
 
女性健康科学研究所 所属教員
   職種
教授
言語種別 英語
発行・発表の年月 2001/10
形態種別 学術雑誌
標題 Lower excitability of the corticospinal tract to transcranial magnetic stimulation during lengthening contractions in human elbow flexors
執筆形態 共著
掲載誌名 Neuroscience Letters
出版社・発行元 Elsevier
巻・号・頁 312(2),pp.83-86
著者・共著者 Sekiguchi H. Kimura T. Yamanaka K. Nakazawa K.
概要 The purpose of this study was to characterize the neuromuscular control during shortening (SHO) and lengthening (LEN) contractions by investigating the input-output (I/O) property in the corticospinal tract. To this end, the relation between various stimulus intensities applied via transcranial magnetic stimulation and the size of motor evoked potentials was investigated in six healthy subjects during elbow flexion and extension. The measured I/O property demonstrates a sigmoidal shape, and is characterized by a plateau value, maximum slope and threshold. The results demonstrated that both the plateau value and maximum slope were significantly lower during LEN contraction than during SHO contraction (P , 0:05), whereas the threshold was found not to be significantly different. These results suggest that both the maximum excitation level and the gain of the corticospinal tract are reduced during LEN contractions.
DOI 10.1016/S0304-3940(01)02197-8