Conductivities of three-layer live human skull
Conductivities of three-layer live human skull
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DOI：
10.1023/a:1014590923185
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发表时间：
2002-03-01
期刊：
影响因子：
2.7
通讯作者：
Sutherling, WW
中科院分区：
文献类型：
--
作者：
Akhtari, M;Bryant, HC;Sutherling, WW
使用四电极法在室温下在不同频率和电场下测定活人头骨的致密层、海绵层和块体层的电导率。在每个样品的顶部和底部表面施加和撤回人类颅骨中出现的较高密度的电流，并测量不同层之间的电势降。我们使用考虑颅骨厚度变化的模型来确定三层颅骨及其各个解剖结构的电导率。结果表明，颅骨海绵状层（16.2~41.1 milliS/m）、上致密层（5.4~7.2 milliS/m）和下致密层（2.8~10.2 milliS/m）电导率存在显着差异且不均匀。颅骨层的电导率在 10-90 Hz 区域内与频率相关，在 0.45-2.07 A/m(2) 区域内为非欧姆电导率。这些电流密度远高于人脑中的电流密度。
Electrical conductivities of compact, spongiosum, and bulk layers of the live human skull were determined at varying frequencies and electric fields at room temperature using the four-electrode method. Current, at higher densities that occur in human cranium, was applied and withdrawn over the top and bottom surfaces of each sample and potential drop across different layers was measured. We used a model that considers variations in skull thicknesses to determine the conductivity of the tri-layer skull and its individual anatomical structures. The results indicate that the conductivities of the spongiform (16.2-41.1 milliS/m), the top compact (5.4-7.2 milliS/m) and lower compact (2.8-10.2 milliS/m) layers of the skull have significantly different and inhomogeneous conductivities. The conductivities of the skull layers are frequency dependent in the 10-90 Hz region and are non-ohmic in the 0.45-2.07 A/m(2) region. These current densities are much higher than those occurring in human brain.