Neuromagnetic activation following active and passive finger movements.
Neuromagnetic activation following active and passive finger movements.
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DOI：
10.1002/brb3.126
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发表时间：
2013-03
影响因子：
3.1
通讯作者：
Kameyama, Shigeki
中科院分区：
文献类型：
--
作者：
Onishi, Hideaki;Sugawara, Kazuhiro;Yamashiro, Koya;Sato, Daisuke;Suzuki, Makoto;Kirimoto, Hikari;Tamaki, Hiroyuki;Murakami, Hiroatsu;Kameyama, Shigeki
利用全脑脑磁图（MEG）研究了被动手指运动后皮层活动和源定位的详细时间过程。我们在13名志愿者中记录了自愿运动后的运动相关皮层磁场和被动运动（PM）后的体感诱发磁场。主动运动后最显著的运动诱发磁场（MEF 1）在运动开始后约35.3 ± 8.4 msec获得，估计等效电流偶极子（ECD）位于初级运动皮层（Brodmann 4区）。在运动开始后30 ~ 100 msec记录到与PM相关的两个MEG反应峰。运动开始后，最早成分（PM 1）在36.2 ± 8.2 msec达到峰值，第二成分（PM 2）在86.1 ± 12.1 msec达到峰值。PM 1的峰值潜伏期和ECD定位，估计是在4区，是最突出的MEF主动运动后的那些相同。PM2的ECDs估计不仅在4区，而且在补充运动区（SMA）和后顶叶皮层（PPC）的运动对侧的半球，并在次级躯体感觉皮层（S2）的两个半球。在SMA中，每个源活动的峰值潜伏期为54-109 msec，在PPC中为64-114 msec，在S2中为84-184 msec。我们的研究结果表明，在中潜伏期（50-100毫秒）PM后的磁波形是不同的主动运动后，这些波形是由几个皮层区域，即，区4和SMA，PPC，和S2的活动产生的。在这项研究中，在SMA，PPC和S2伴随PM的活动在人类成功地记录使用MEG与多偶极子分析系统的时间过程。
The detailed time courses of cortical activities and source localizations following passive finger movement were studied using whole-head magnetoencephalography (MEG). We recorded motor-related cortical magnetic fields following voluntary movement and somatosensory-evoked magnetic fields following passive movement (PM) in 13 volunteers. The most prominent movement-evoked magnetic field (MEF1) following active movement was obtained approximately 35.3 ± 8.4 msec after movement onset, and the equivalent current dipole (ECD) was estimated to be in the primary motor cortex (Brodmann area 4). Two peaks of MEG response associated with PM were recorded from 30 to 100 msec after movement onset. The earliest component (PM1) peaked at 36.2 ± 8.2 msec, and the second component (PM2) peaked at 86.1 ± 12.1 msec after movement onset. The peak latency and ECD localization of PM1, estimated to be in area 4, were the same as those of the most prominent MEF following active movement. ECDs of PM2 were estimated to be not only in area 4 but also in the supplementary motor area (SMA) and the posterior parietal cortex (PPC) over the hemisphere contralateral to the movement, and in the secondary somatosensory cortex (S2) of both hemispheres. The peak latency of each source activity was obtained at 54–109 msec in SMA, 64–114 msec in PPC, and 84–184 msec in the S2. Our results suggest that the magnetic waveforms at middle latency (50–100 msec) after PM are different from those after active movement and that these waveforms are generated by the activities of several cortical areas, that is, area 4 and SMA, PPC, and S2. In this study, the time courses of the activities in SMA, PPC, and S2 accompanying PM in humans were successfully recorded using MEG with a multiple dipole analysis system.
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