Electrodermal Activity Is Sensitive to Cognitive Stress under Water
Electrodermal Activity Is Sensitive to Cognitive Stress under Water
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DOI：
10.3389/fphys.2017.01128
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发表时间：
2018-01-17
影响因子：
4
通讯作者：
Chon, Ki H.
中科院分区：
文献类型：
--
作者：
Posada-Quintero, Hugo F.;Florian, John P.;Chon, Ki H.
当潜水员在深水中时，仅高压和低温就能引起严重的压力，挑战人类的生理控制系统。认知压力的增加，例如在军事使命期间，加剧了挑战。在这些条件下，人类更容易受到自主神经失衡的影响。自主神经系统（ANS）的可靠评估工具可以用来作为指标的相对程度的压力，潜水员正在经历的，这可能揭示在使命的风险增加。皮肤电活动（FDA）是由于汗液产生而导致的皮肤表面电导变化的量度，被认为是ANS交感神经控制的非侵入性评估的有希望的替代方案。EDA对多种应力敏感。因此，作为第一步，我们在时域和频域中测试了FDA的敏感性，特别是在受试者浸水期间对认知压力的敏感性（尽管为了安全起见，他们的测量手指是干燥的）。来自14名志愿者的数据来自实验。在浸泡在水中4分钟的调整和基线期后，受试者接受了Stroop任务，这是已知的诱导认知压力。FDA的时域指标，皮肤电导水平（SCL）和非特异性皮肤电导反应（NS.SCRs），在认知应激期间与基线测量相比没有变化。FDA的频域指标EDASymp（基于功率谱分析）和TVSymp（基于时频分析）在认知应激过程中发生了显著变化。这导致的结论是，EDA，评估频谱分析，是敏感的认知应激在水中浸泡的科目，并有可能被用来检测认知应激潜水员。
When divers are at depth in water, the high pressure and low temperature alone can cause severe stress, challenging the human physiological control systems. The addition of cognitive stress, for example during a military mission, exacerbates the challenge. In these conditions, humans are more susceptible to autonomic imbalance. Reliable tools for the assessment of the autonomic nervous system (ANS) could be used as indicators of the relative degree of stress a diver is experiencing, which could reveal heightened risk during a mission. Electrodermal activity (FDA), a measure of the changes in conductance at the skin surface due to sweat production, is considered a promising alternative for the non-invasive assessment of sympathetic control of the ANS. EDA is sensitive to stress of many kinds. Therefore, as a first step, we tested the sensitivity of FDA, in the time and frequency domains, specifically to cognitive stress during water immersion of the subject (albeit with their measurement finger dry for safety). The data from 14 volunteer subjects were used from the experiment. After a 4-min adjustment and baseline period after being immersed in water, subjects underwent the Stroop task, which is known to induce cognitive stress. The time-domain indices of FDA, skin conductance level (SCL) and nonspecific skin conductance responses (NS.SCRs), did not change during cognitive stress, compared to baseline measurements. Frequency-domain indices of FDA, EDASymp (based on power spectral analysis) and TVSymp (based on time-frequency analysis), did significantly change during cognitive stress. This leads to the conclusion that EDA, assessed by spectral analysis, is sensitive to cognitive stress in water-immersed subjects, and can potentially be used to detect cognitive stress in divers.