经颅直流电刺激电极面积对球头模型中空间电场分布影响的研究

采用了广泛使用的三层球头模型,分别固定阴极和阳极矩形电极的面积为25cm₂,再分别从1cm₂到45cm₂增大阳极和阴极的电极的面积,分别得到阳极和阴极电极面积与靶点位置处电场分布的关系。最终得到特定靶点处的电场分布与阳极和阴极电极面积关系的曲线。结果表明,不同的阴阳极电极面积对特定靶点位置的电场分布有一定的影响,并且不同的靶点位置处电场分布受到影响的程度也不同。

The research about the effect of the spatial electric field distribution of the electrode areas in a spherical head model during the transcranial direct current stimulation

A widely used three layers spherical head model is adopted. Keeping the cathode electrode area at 25cm2 and increasing the anode electrode areas from 1cm2 to 45cm2 ,we get the relationship between the anode electrode areas and the electric field distribution of the target points. On the contrary, keeping the anode electrode area at 25cm2 and increasing the cathode electrode areas from 1cm2 to 45cm2, we obtain the relationship between the cathode electrode areas and the electric field distribution of the target points. Finally, the relation curves of the electric field distribution special target points and the anode and cathode electrode areas are obtained. It is showed that different anode and cathode electrode areas have effects on special target points and the levels of the effects are different in the target points.