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Whole-brain functional magnetic resonance imaging of human brain during voluntary movements of dominant and subdominant hands
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 5
- DOI:
- 10.3760/j.issn:1005-1201.2003.05.004
- Key Word:
- 磁共振成像;手;半球优势;脑
Abstract： 目的利用全脑功能磁共振成像(fMRI)技术,探讨参与利手和非利手简单随意运动的关键脑结构.方法采用Siemens公司Sonata 1.5 T 磁共振成像系统,对7名健康右利手志愿者的利手或非利手食指按键运动进行了全脑扫描.数据经头动矫正、空间标准化、空间平滑等预处理后,通过互相关分析分别获得利手和非利手运动的脑激活统计参数图.结果利手运动主要激活对侧初级运动区(MI)、双侧辅助运动区(SMA)、双侧运动二区(MII)和同侧小脑,而非利手运动除以上区域外还激活了对侧前运动区(PMC),而且SMA和MII的激活体积大于利手运动.结论全脑fMRI研究表明,随意运动依赖于大脑皮质和小脑等许多脑结构的参与.与利手运动相比,非利手运动更依赖于SMA和PMC等高级运动控制区.
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