Schnitzler A, Witte O W, Cheyne D, Haid G, Vrba J, Freund H J
Neurologische Klinik, Heinrich Heine-Universität, Düsseldorf, Germany.
Neuroreport. 1995 Aug 21;6(12):1653-8. doi: 10.1097/00001756-199508000-00016.
Modulatory influences of skilled exploratory finger movements on somatosensory evoked magnetic fields evoked by median nerve stimulation were investigated in six healthy subjects using a whole head magnetometer (MEG) system. The exploratory finger movements caused major changes in the somatosensory evoked fields. The most prominent effect was a reversal of the dipolar magnetic field around 30 ms after median nerve stimulation. Similar but less pronounced effects were exerted by repetitive finger movements and tactile stimulation of the hand. A dipole analysis and super-imposition of resulting sources on individual MRI scans showed that all somatosensory evoked fields up to 60 ms after stimulation, and the modulation of these responses were located in the primary somatosensory cortex (SI).
利用全头磁强计（MEG）系统，在6名健康受试者中研究了熟练的探索性手指运动对正中神经刺激诱发的体感诱发磁场的调节影响。探索性手指运动引起体感诱发电场的重大变化。最显著的效应是在正中神经刺激后约30毫秒左右偶极磁场的反转。重复性手指运动和手部触觉刺激也产生了类似但不太明显的效应。偶极分析以及将所得源叠加到个体磁共振成像扫描上显示，刺激后60毫秒内所有体感诱发电场及其反应的调节均位于初级体感皮层（SI）。
