The conductivity of the human skull:: Results of in vivo and in vitro measurements

被引:345
作者
Oostendorp, TF
Delbeke, J
Stegeman, DF
机构
[1] Catholic Univ Nijmegen, Dept Med Phys & Biophys, NL-6525 EZ Nijmegen, Netherlands
[2] Univ Catholique Louvain, Neural Rehabil Engn Lab, B-1200 Brussels, Belgium
[3] Univ Nijmegen Hosp, Dept Clin Neurophysiol, NL-6525 EZ Nijmegen, Netherlands
[4] Univ Jena, Inst Pathofysiol, Motor Res Grp, D-07740 Jena, Germany
关键词
neural source localization; skull conductivity;
D O I
10.1109/TBME.2000.880100
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The conductivity of the human skull was measured both in vitro and in vivo. The in vitro measurement was performed on a sample of fresh skull placed within a saline environment. For the in vivo measurement a small current was passed through the head by means of two electrodes placed on the scalp, The potential distribution thus generated on the scalp was measured in two subjects for two locations of the current injecting electrodes, Both methods revealed a skull conductivity of about 0.015 boolean OR /m. For the conductivities of the brain, the skull and the scalp a ratio of 1:1/15:1 was found. This is consistent with some of the reports on conductivities found in the literature, but differs considerably from the ratio 1 :1/80:1 commonly used in neural source localization. An explanation is provided for this discrepancy, indicating that the correct ratio is 1:1/15:1.
引用
收藏
页码:1487 / 1492
页数:6
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