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| 手指自主按键运动中脑磁图信号的相干性分析 | |
| 引用本文： | 侯文生,张阳,李卫娜,吴小鹰,吴国材,冯华,郑小林.手指自主按键运动中脑磁图信号的相干性分析[J].山东大学学报(理学版),2011,46(1):1-5. |
| 作者姓名： | 侯文生 张阳 李卫娜 吴小鹰 吴国材 冯华 郑小林 |
| 作者单位： | 1.重庆大学生物流变科学与技术教育部重点实验室, 重庆 400044; 2.第三军医大学附属西南医院神经外科, 重庆 400038 |
| 基金项目： | 国家自然科学基金资助项目(077054630970758); 重庆市自然科学基金资助项目(2006BB20432007BB5148); 重庆大学“211工程”三期创新人才培养计划建设项目(S-09104) |
| 摘 要： | 为了获取手指运动过程中不同脑功能区之间的联系,以及这种功能性联系在时频域和空间的变化,记录了与手指运动相关的脑磁图信号,然后对其进行相干性分析,并计算了不同位置信号之间的相干性系数。通过时频分析进一步探讨了在α(5～15Hz)、β(16～25Hz)、lowγ(30～45Hz)3个频带的不同皮层区联系随时间的变化关系。结果表明:α、β、lowγ 3个频带与所选参考信号相干性呈现出位置大致相同,相干强度和相干范围均从α到lowγ依次递减,相干性系数随时间而变化,进而推论出相干性的变化表明对侧运动皮层存在不同的神经模式,而且这些神经模式也是随时间变化的,由此反映出不同功能区的联系在时频域的变化。 |
| 关 键 词： | 脑磁图 运动 相干性 时频分析 |
| 收稿时间： | 2010-10-16 |
Coherence analysis of magnetoencephalography signals related to self-paced finger press |
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| HOU Wen-sheng,ZHANG Yang,LI Wei-na,WU Xiao-ying,WU Guo-cai,FENG Hua,ZHENG Xiao-lin.Coherence analysis of magnetoencephalography signals related to self-paced finger press[J].Journal of Shandong University,2011,46(1):1-5. | |
| Authors: | HOU Wen-sheng ZHANG Yang LI Wei-na WU Xiao-ying WU Guo-cai FENG Hua ZHENG Xiao-lin |
| Institution: | 1. Key Laboratory of Biorheological Science and Technology, Ministry of Education, Chongqing University, Chongqing 400044, China; 2.Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China |
| Abstract: | The present study was aimed at investigating the connection between spatially separated brain regions,as well as the changes of the connection in time and frequency domain.Self-paced finger press related magnetoencephalography signals were recorded and analyzed by means of coherence analysis.The coherence coefficient of two signals corresponding to different cortical areas was calculated.Time frequency analysis was also used to determine if the cortical connection changes closely co-vary with time over the ... |
| Keywords: | magnetoencephalography movement coherence time frequency analysis |
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