Correspondence between short-latency somatosensory evoked brain potentials and cortical magnetic fields following median nerve stimulation
Correspondence between short-latency somatosensory evoked brain potentials and cortical magnetic fields following median nerve stimulation
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DOI：
10.1016/s0006-8993(01)02623-3
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发表时间：
2001-07-27
期刊：
影响因子：
2.9
通讯作者：
Kakigi, R
中科院分区：
文献类型：
--
作者：
Hoshiyama, M;Kakigi, R
我们研究了正中神经刺激后20-30ms的体感诱发皮层磁场(SEF)成分与体感诱发电位(SEP)成分的对应关系。7名健康受试者在刺激右侧正中神经后同时记录SEP和SEF。选择了20个SEF和SEP的单扫描历元，其中可识别出20ms、1m处的第一个SEF分量和30ms、2m处的第二个分量。选择的历元在1M和2M的峰值作为触发周期(0毫秒)被重新平均。比较三种平均状态下SEP各成分P20和N30(Fz-A2)、N20、cP25和cN30(C3-Fz)、N20和pP30(P3-A2)、N20和P30(P3-Fz)的偏转宽度和时间离散度(Td)。1M峰期平均时，N20/P20成分的TDS显著减小(单因素方差分析，P
We investigated the somatosensory evoked cortical magnetic field (SEF) components corresponding to the somatosensory evoked potential (SEP) components between 20 and 30 ms after median nerve stimulation. SEP and SEF were simultaneously recorded after right median nerve stimulation in seven healthy subjects. Twenty single-sweep epochs of SEF and SEP were selected, in which the first SEF component at 20 ms, 1M, and the second component at 30 ms, 2M, were identifiable. The selected epochs were re-averaged at the peaks of 1M and 2M as the triggering periods (zero ms). The width of the deflection, the temporal dispersion (TD), of SEP components, P20 and N30 (Fz-A2), N20, cP25 and cN30 (C3-Fz), N20 and pP30 (P3-A2), and N20 and P30 (P3-Fz), were compared between three averaging conditions. The N20/P20 components showed significantly smaller TDs when the epochs were averaged at the 1M peak (one-way factorial ANOVA, P