Somatosensory evoked potentials and magnetic fields: separation of multiple source activities.
Somatosensory evoked potentials and magnetic fields: separation of multiple source activities.
复制标题
体感诱发电位和磁场：多源活动的分离。
DOI：
10.1088/0967-3334/14/4a/006
复制
发表时间：
1993
影响因子：
3.2
通讯作者：
H. Buchner
中科院分区：
文献类型：
--
作者：
M. Scherg;H. Buchner
采用多通道（32个SEP通道，24个SEF通道）装置记录亚琛和赫尔辛基2名被试的正中神经体感诱发电位（SEP）和磁场（SEF）。将单运动偶极子模型和多静止偶极子模型与Scherg的脑电源分析（BESA）程序进行了比较。仅在SEP中发现了反映进入脑干和离开丘脑时传入神经的皮层下源。SEF和SEP的分析显示，在对侧皮层后和中央前投射区至少有四个重叠的源活动。在中央沟深处的两个来源不能明确地解决。由于偶极子取向接近径向，因此在SEP的源分析中，更浅层的源被更好地定义，可能反映了区域1的激活。第四个来源更为后验。在SEP和SEF中，它的初始活动在30 ms左右一致。在对当前脑电信号和脑电信号数据的分析中观察到的几个问题表明，同时测量和分析多通道脑电信号和脑电信号数据将大大提高时空分辨率。
Median nerve somatosensory evoked potentials (SEP) and magnetic fields (SEF) were recorded in two subjects with multichannel (32 SEP, 24 SEF channels) devices in Aachen and Helsinki. Single-moving- and multiple-stationary-dipole models were compared with the brain electric source analysis (BESA) program of Scherg. Subcortical sources, reflecting the afferent neural volley when entering the brainstem and leaving the thalamus, were found only in the SEP. The analysis of SEF and SEP revealed a minimum of four overlapping source activities in the region of the contralateral post-and precentral cortical projection areas. Two sources in the depth of the central sulcus could not be resolved unambiguously. The third, more superficial source, which probably reflects activation of area 1, was better defined in the source analysis of the SEP, because dipole orientation was close to radial. The fourth source was more posterior. Its initial activity around 30 ms was seen consistently in SEP and SEF. Several problems observed in the analysis of the present MEG and EEG data suggest that the simultaneous measurement and analysis of multichannel EEG and MEG data will substantially increase spatio-temporal resolution.
皮层电图时空分析的人手感觉运动皮层的功能解剖学。
DOI：
10.1016/0013-4694(91)90019-z
发表时间：
1991
期刊：
Electroencephalography and clinical neurophysiology
影响因子：
--
作者：
Baumgartner,C;Barth,DS;Levesque,MF;Sutherling,WW
通讯作者：
Sutherling,WW