English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 60861/93638 (65%)
造访人次 : 1113047      在线人数 : 18
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻

    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/53531

    题名: Dimensional complexity of neuromagnetic activity reduced during finger movement of greater difficulty
    作者: Wu, Yu-zu;Yang, Ting-hui;Lin, Yung-yang;Chen, Shyan-shiou;Liao, Kwong-kum;Chen, Li-fen;Yeh, Tzu-chen;Wu, Yu-te;Ho, Low-tone;Hsieh, Jen-chuen
    贡献者: 淡江大學數學學系
    关键词: Nonlinear dynamics;Magnetoencephalography;Correlation dimension;Hemispheric asymmetry;Neuronal connectivity;Task difficulty
    日期: 2006-11
    上传时间: 2011-05-20 09:42:10 (UTC+8)
    出版者: Elsevier
    摘要: Objective
    We investigated the variation in dimensionality (D2) of neuromagnetic activity over the primary sensorimotor cortex (SM1) in healthy adults performing motor tasks of different difficulty.

    Magnetoencephalography (MEG) was used to record neuromagnetic activity during self-paced, brisk unimanual finger extension at a rate of 1 and 2 Hz using the index finger of the dominant and non-dominant hands in 16 healthy subjects. Motor task difficulty was rated by the relative difference in time measurement between 1 and 2 Hz finger movements of both hands. The relative difference in dimensionality of SM1 activity was calculated by subtracting the D2 value in 2 Hz movement from that in 1 Hz one within subjects.

    Simple regression analyses show a significantly negative relationship between the relative dimensional complexity and the relative motor task difficulty in the contralateral SM1 for the left- (p < 0.05), but not the right- (p = 0.447) hand movement.

    The present data suggest that a motor task of greater difficulty may engender a reduction of simultaneously active quasi-independent neuronal generators in the contralateral SM1 underpinned by stronger neuronal connectivity of a relatively low dimensionality.

    The decrease in dimensional complexity of MEG activity associated with a motor task of greater difficulty gives new insights to motor control strategy.
    關聯: Clinical Neurophysiology 117(11), pp.2473-2481
    DOI: 10.1016/j.clinph.2006.06.715
    显示于类别:[數學學系暨研究所] 期刊論文


    档案 描述 大小格式浏览次数
    1388-2457_117(11)_p2473-2481.pdf294KbAdobe PDF204检视/开启



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈