| 手指屈指运动诱发大脑运动皮质区运动相关电位研究 |
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| 引用本文： | 郭峰,张日辉.手指屈指运动诱发大脑运动皮质区运动相关电位研究[J].北京体育大学学报,2015,38(3):72-77. |
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| 作者姓名： | 郭峰 张日辉 |
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| 作者单位： | 沈阳体育学院运动人体科学学院，辽宁 沈阳 110102;沈阳体育学院运动人体科学学院，辽宁 沈阳 110102 |
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| 基金项目： | 基金项目：国家自然科学基金（编号：31371046）；辽宁省教育厅一般科学研究项目（编号：L2012412），博士学位论文 |
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| 摘 要： | 摘要：目的：观察上肢手指屈指运动诱发的大脑运动皮质区的运动相关电位（movement-related cortical potentials, MRCPs）的形态以及分布特征。方法：本研究以13名健康受试者为研究对象，让其右手手指执行100次30%MVC的间断性地握力收缩，同时测量受试者连续的脑电信号和肌力信号。以肌电激活触发点为事件相关点，利用平均叠加法提取出运动事件相关电位。结果：MRCPs电位呈现缓慢上升然后缓慢下降的负性电位，主要分布在运动皮质区（辅助运动区、初级运动区），左右大脑半球非对称分布，运动对侧大脑半球的电位幅值显著高于运动同侧大脑半球（P < 0.01）。MRCPs峰值电位出现在大脑中线辅助运动区的FCz和Cz位置。结论：指屈肌次最大随意等长收缩诱发的MRCPs电位呈现一种先上升后下降的非线性变化特征，其空间分布样式更加靠近大脑运动对侧半球的内侧。另外，MRCPs电位主要反映运动前准备和运动触发时的中枢命令，但无法反映动作持续阶段的中枢命令。
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| 关 键 词： | 关键词：屈指运动 大脑运动皮质区 运动相关电位 辅助运动区 |
| 收稿时间： | 2014/11/19 0:00:00 |
Movement-Related Cortical Potentials (MRCPs) in Motor Area of Cerebral Cortex Induced by Movement of Finger Flexion |
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| GUO Feng and ZHANG Ri-hui.Movement-Related Cortical Potentials (MRCPs) in Motor Area of Cerebral Cortex Induced by Movement of Finger Flexion[J].Journal of Beijing Sport University,2015,38(3):72-77. |
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| Authors: | GUO Feng and ZHANG Ri-hui |
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| Institution: | Sport Science College, Shenyang Sport University, Shenyang 110102, Liaoning China;Sport Science College, Shenyang Sport University, Shenyang 110102, Liaoning China |
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| Abstract: | Abstract: Objective: This study observed characteristics of shape and distribution of movement-related cortical potentials (MRCPs) in Motor Area of Cerebral Cortex induced by movement of figure flexion. Methods: Thirteen healthy subjects were screened as subjects, their right fingers were asked to do100 intermittent contractions of 30% MVC, and their continuous electroencephalography (EEG) and force signals were collected. The MRCPs was distracted by the average superposition method when the trigger point of surface electromyography was seemed as movement-related point. Results: The MRCPs were negative, they increased slowly at the beginning and then slowly decreased, and they mainly distributed in motor area of cerebral cortex (supplementary motor area (SMA) and primary motor area) but non-symmetrically distributed in left and right cerebral hemisphere. The amplitudes of MRCPs in contralateral hemisphere of movement were significantly higher than those in ipsilateral hemisphere of movement (P < 0.01). The peak value of MRCPs occurred on FCz and Cz sites of SMA in the midline of brain. Conclusions: MRCPs induced by sub-maximum voluntary isometric contraction of finger flexor show a nonlinear change that increases at the beginning and then decreases, and they mainly locate in medial part of contralateral hemisphere of movement. In addition, the MRCPs reflect the central commands related to preparatory process and execution of movement rather than sustainable phase of movement. |
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| Keywords: | Key words: movement of finger flexion motor area of cerebral cortex movement-related cortical potentials (MRCPs) supplementary motor area (SMA) |
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