Abstract：The electrode topology is the key to the design of tDCS stimulator, which plays a decisive role in the stimulation effect and safety of transcranial direct current stimulation. In order to meet the increasing requirements for stimulating effects in clinics and research, various new electrode topologies have been developed in recent years, with different structures and stimulus effects. Aiming to make a systematical and comprehensive summary, existing electrode topologies were classified according to the structure and control strategy in this review, including two-electrode, multi-return electrode and electrode array. By establishing quantitative evaluation indexes focusing degree F and current efficiency μ, the performance of three kinds of electrodes was quantitatively evaluated and compared, and the characteristics of stimulation effect of each electrode topology were analyzed. In addition, the problems existing in the current electrode topology in terms of focusing degree, current efficiency and operability were discussed. At the same time, the future development direction of the electrode topology was proposed including under the premise of ensuring safety, improving the operability of high-performance electrode topology, focusing on solving poor focalization and low current efficiency due to differences in electrical characteristics of different layers of head tissues.
许赟, 徐坤, 陈俊语, 徐硕. 经颅直流电刺激电极拓扑研究进展[J]. 中国生物医学工程学报, 2020, 39(3): 342-350.
Xu Yun, Xu Kun, Chen Junyu, Xu Shuo. The Research Progress in Electrode Topology of Transcranial Direct Current Stimulation. Chinese Journal of Biomedical Engineering, 2020, 39(3): 342-350.
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