SCALP CURRENT-DENSITY MAPPING - VALUE AND ESTIMATION FROM POTENTIAL DATA
SCALP CURRENT-DENSITY MAPPING - VALUE AND ESTIMATION FROM POTENTIAL DATA
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DOI：
10.1109/tbme.1987.326089
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发表时间：
1987-04-01
影响因子：
4.6
通讯作者：
PERNIER, J
中科院分区：
文献类型：
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作者：
PERRIN, F;BERTRAND, O;PERNIER, J
头皮电流密度（SCD）可以识别头皮电流源和电流汇。SCD不依赖于参考电位，其峰谷比头皮电位（SP）的峰谷尖锐。与SP相比，SCD主要反映皮层发生器的活动。SCD映射似乎是一个有价值的工具，空间分裂模糊SP分布，由于同时活跃的发电机。SCD图可以从任何足够平滑的数学SP图计算。本文对SP的插值曲面样条法的SCD估计误差进行了评价。给出了同时使用SP和SCD分析体感诱发数据的一个例子。
Scalp current density (SCD) makes possible the identification of scalp sources and sinks of current. SCD is reference independent and its peaks and troughs are sharper than those of the scalp potential (SP). SCD, by comparison to SP, reflects mainly the activity of cortical generators. SCD mapping appears to be a valuable tool to spatially split smeared SP distribution due to simultaneously active generators. The SCD map may be computed from any sufficiently smooth mathematical SP map. An evaluation of the error of SCD estimation is given for a surface spline method of interpolation of SP. An example of the simultaneous use of SP and SCD in the analysis of somatosensory evoked data is given.