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
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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 |