Nunez P
TIT J Life Sci. 1977;7(3-4):65-72.
Estimates are made of the potential field at the scalp and cortical surfaces due to large numbers of synchronously active cortical current sources. The basic model is a dipole layer in an infinite, homogeneous conducting medium. Estimates are made of the effects of various inhomogeneities on the attenuation of potentials. It is shown that these approximate methods seem to illuminate the following questions which are of interest in EEG research: (1) The interpretation of reference recordings in terms of local source currents; (2) The differences in amplitude between scalp and cortical recordings; (3) The differences in frequency spectra between scalp and cortical recordings; (4) The observation that alpha rhythm can be recorded deep in the brain; and (5) The effects of simple inhomogeneities on the attenuation of potentials.
针对大量同步活动的皮层电流源，对头皮和皮层表面的电位场进行了估计。基本模型是无限均匀导电介质中的偶极层。对各种不均匀性对电位衰减的影响进行了估计。结果表明，这些近似方法似乎能阐明脑电图研究中感兴趣的以下问题：（1）根据局部源电流对参考记录进行解释；（2）头皮记录和皮层记录之间的幅度差异；（3）头皮记录和皮层记录之间的频谱差异；（4）在大脑深部可以记录到阿尔法节律的观察结果；以及（5）简单不均匀性对电位衰减的影响。
