电静息磁场
Electrically silent magnetic fields.
作者信息
Roth B J, Wikswo J P
出版信息
Biophys J. 1986 Oct;50(4):739-45. doi: 10.1016/S0006-3495(86)83513-5.
Abstract
There has been a significant controversy over the past decade regarding the relative information content of bioelectric and biomagnetic signals. In this paper we present a new, theoretical example of an electrically-silent magnetic field, based on a bidomain model of a cylindrical strand of tissue generalized to include off-diagonal components in the conductivity tensors. The physical interpretation of the off-diagonal components is explained, and analytic expressions for the electrical potential and the magnetic field are found. These expressions show that information not obtainable from electrical potential measurements can be obtained from measurements of the magnetic field in systems with conductivity tensors more complicated than those previously examined.
摘要
在过去十年中，关于生物电信号和生物磁信号的相对信息含量一直存在重大争议。在本文中，我们基于一个圆柱形组织束的双域模型（该模型已推广到包括电导率张量中的非对角分量），给出了一个电沉默磁场的新的理论示例。解释了非对角分量的物理解释，并找到了电势和磁场的解析表达式。这些表达式表明，在电导率张量比先前研究的更复杂的系统中，从电势测量中无法获得的信息可以从磁场测量中获得。
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