IEEE Trans Biomed Eng. 2017 Dec;64(12):2979-2987. doi: 10.1109/TBME.2017.2754220. Epub 2017 Sep 18.
The focus of this research is to evaluate the effects of design parameters including surface area, distance between and geometry of dry flexible electrodes on electrodermal activity (EDA) stimulus response detection.
EDA is a result of the autonomic nervous system being stimulated, which causes sweat and changes the electrical characteristics of the skin. Standard silver/silver chloride (Ag/AgCl) EDA electrodes are rigid and lack conformability in contact with skin. In this study, flexible dry Ag/AgCl EDA electrodes were fabricated on a compliant substrate, used to monitor EDA stimulus responses and compared to results simultaneously collected by rigid dry Ag/AgCl electrodes.
A repeatable fabrication process for flexible Ag/AgCl electrodes has been established. Surface area, distance between and geometry of electrodes are shown to affect the detectability of the EDA response and the minimum number of sweat glands to be covered by the electrodes has been estimated at 140, or more, in order to maintain functionality. The optimal flexible EDA electrode is a serpentine design with a 0.15 cm surface area and a 0.20 cm distance with an average Pearson correlation coefficient of .
Fabrication of flexible electrodes is described and an understanding of the effects of electrode designs on the EDA stimulus response detection has been established and is potentially related to the coverage of sweat glands.
This work presents a novel systematic approach to understand the effects of electrode designs on monitoring EDA which is of importance for the design of wearable EDA monitoring devices.
本研究的重点是评估包括表面积、干燥柔性电极之间的距离和几何形状等设计参数对皮肤电活动（EDA）刺激反应检测的影响。
EDA 是自主神经系统受到刺激的结果，它会导致出汗并改变皮肤的电学特性。标准的银/氯化银（Ag/AgCl）EDA 电极是刚性的，与皮肤接触时缺乏顺应性。在这项研究中，柔性干燥 Ag/AgCl EDA 电极被制造在一个顺应性基底上，用于监测 EDA 刺激反应，并与同时由刚性干燥 Ag/AgCl 电极收集的结果进行比较。
已经建立了一种可重复的柔性 Ag/AgCl 电极制造工艺。电极的表面积、距离和几何形状被证明会影响 EDA 反应的可检测性，并且为了保持功能，估计至少需要 140 个或更多的汗腺被电极覆盖。最佳的柔性 EDA 电极是蛇形设计，表面积为 0.15 cm²，距离为 0.20 cm，平均 Pearson 相关系数为.
描述了柔性电极的制造，并建立了对电极设计对 EDA 刺激反应检测的影响的理解，这与汗腺的覆盖范围有关。
这项工作提出了一种新颖的系统方法来理解电极设计对 EDA 监测的影响，这对于可穿戴 EDA 监测设备的设计非常重要。
