The difference in hemodynamic responses between dominant and non-dominant hands during muscle contraction and relaxation: An fNIRS study
The difference in hemodynamic responses between dominant and non-dominant hands during muscle contraction and relaxation: An fNIRS study
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DOI：
10.1371/journal.pone.0220100
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发表时间：
2019-07
期刊：
影响因子：
3.7
通讯作者：
Naoko Yokoyama;Chiaki Ohtaka;Kouki Kato;H. Kubo;H. Nakata
中科院分区：
文献类型：
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作者：
Naoko Yokoyama;Chiaki Ohtaka;Kouki Kato;H. Kubo;H. Nakata
本研究采用功能性近红外光谱技术（fNIRS），研究了右利手被试在连续肌肉收缩和放松运动任务中，右利手和左非利手同侧或对侧大脑半球神经激活的差异。受试者在四种条件下执行任务：（1）右手向上（R-Up），（2）左手向上（L-Up），（3）右手向下（R-Down），（4）左手向下（L-Down）。在R-Up条件下，运动前区（PM）的oxy-Hb峰值在对侧半球显著大于同侧半球，而在L-Up条件下，对侧半球与同侧半球之间没有显著差异。此外，在R-Down条件下，PM的峰值幅度在对侧半球比同侧半球更负，而在L-Down条件下，PM的峰值幅度在同侧半球比对侧半球更负。这些结果表明，右利手受试者的左半球PM在肌肉收缩和放松与力控制中起着重要的作用。
The present study used functional near-infrared spectroscopy (fNIRS), and investigated the differences in neural activation of ipsi- or contralateral hemispheres between right dominant and left non-dominant hands among right-handed subjects using consecutive motor tasks with muscle contraction and relaxation. The subjects performed tasks under four conditions: (1) right hand up (R-Up), (2) left hand up (L-Up), (3) right hand down (R-Down), and (4) left hand down (L-Down). The peak amplitude of oxy-Hb was significantly larger at the contralateral than ipsilateral hemisphere in the premotor area (PM) under the R-Up condition, and no significant differences were observed between contra- and ipsilateral hemispheres under the L-Up condition. In addition, the peak amplitude was more negative at the contra- than ipsilateral hemisphere in the PM under the R-Down condition, while the peak amplitude was significantly more negative at the ipsi- than contralateral hemisphere in the PM under the L-Down condition. These results suggest that the PM of the left hemisphere among right-handed subjects plays an important role in muscle contraction and relaxation with force control.