一种局灶性磁脑刺激模型。

A model for focal magnetic brain stimulation.

作者信息

Murro A, Smith J R, King D W, Gallagher B B

机构信息

Department of Neurology, VA Medical Center, Augusta, GA.

出版信息

Int J Biomed Comput. 1992 Jul;31(1):37-43. doi: 10.1016/0020-7101(92)90052-t.

DOI:10.1016/0020-7101(92)90052-t

PMID:1644500

Abstract

In this study, we describe a magnetic coil designed for focal brain stimulation. We determined the distribution of magnetically induced currents using a multi-concentric spherical cranial computer model. The induced currents were primarily linearly oriented and concentrated below the coil's center. In comparison with large coils, small coils were less efficient but produced a more concentrated current distribution. Variations in conductivity among brain, scalp and skull produced secondary currents that reduced the magnetically induced current. This reduction in magnetically induced current was greater for larger coils.

摘要

在本研究中，我们描述了一种设计用于局灶性脑刺激的磁线圈。我们使用多同心球形颅骨计算机模型确定了磁感应电流的分布。感应电流主要呈线性取向，并集中在线圈中心下方。与大线圈相比，小线圈效率较低，但产生的电流分布更集中。脑、头皮和颅骨之间电导率的变化产生了二次电流，从而降低了磁感应电流。对于较大的线圈，磁感应电流的这种降低更为明显。