Gamboa Patricia, Varandas Rui, Mrotzeck Katrin, Plácido da Silva Hugo, Quaresma Cláudia
LIBPhys (Laboratory for Instrumentation, Biomedical Engineering and Radiation Physics), NOVA School of Science and Technology, 2829-516 Caparica, Portugal.
PLUX-Wireless Biosignals S.A., 1050-059 Lisbon, Portugal.
Sensors (Basel). 2025 Mar 12;25(6):1762. doi: 10.3390/s25061762.
Electrodermal activity (EDA) reflects the variation in the electrical conductance of the skin in response to sweat secretion, constituting a non-invasive measure of the sympathetic nervous system. This system intervenes in reactions to stress and is strongly activated in emotional states. In most cases, EDA signals are collected from the hand (fingers or palms), which is not an ideal location for a sensor when the participant has to use their hands during tasks or activities. This study aims to explore alternative locations for retrieving EDA signals (e.g., the chest, back, and forehead). EDA signals from 25 healthy participants were collected using a protocol involving different physical stimuli that have been reported to induce an electrodermal response. The features extracted included the Skin Conductance Response (SCR) height, SCR amplitude, and peak prominence. An analysis of these features and the analysis of the correlation between the standard position with the different locations suggested that the chest, while a possible alternative for EDA signal collection, presents some weak results, and further evaluation of this site is needed. Additionally, the forehead should be excluded as an alternative site, at least in short-term measurements.
皮肤电活动（EDA）反映了皮肤电导率随汗液分泌的变化，构成了一种测量交感神经系统的非侵入性方法。该系统参与对压力的反应，并在情绪状态下被强烈激活。在大多数情况下，EDA信号是从手部（手指或手掌）采集的，当参与者在执行任务或活动时必须使用双手时，这对于传感器来说并非理想位置。本研究旨在探索获取EDA信号的替代位置（例如胸部、背部和前额）。使用涉及不同身体刺激的方案收集了25名健康参与者的EDA信号，据报道这些刺激会引发皮肤电反应。提取的特征包括皮肤电导反应（SCR）高度、SCR幅度和峰值突出度。对这些特征的分析以及对标准位置与不同位置之间相关性的分析表明，胸部虽然可能是收集EDA信号的替代位置，但结果有些不理想，需要对该部位进行进一步评估。此外，至少在短期测量中，前额应排除作为替代部位。
