Arza A, Garzón J M, Hemando A, Aguiló J, Bailon R
Annu Int Conf IEEE Eng Med Biol Soc. 2015;2015:3331-4. doi: 10.1109/EMBC.2015.7319105.
This paper presents a study performed in 25 young healthy subjects measuring the evolution of heart rate variability (HRV) indices during emotional stress. Acute emotional stress was generated with a modified version of Trier Social Stress Test (TSST). The TSST comprises several tasks which include a memory test, anticipation of stress, public exposition, and an arithmetic task. Each task has different demanding conditions, carrying subjects' emotional stress to different states. An autogenic relaxation was done before TSST. Significant differences in HRV indices were observed in the arithmetic and memory task with respect to the relaxation stage. In particular during the arithmetic task, mean heart rate increased 22% (p-value <0.00001) the power in the very low frequency band increased 47% (p-value <0.00001 and normalized power in the low frequency (LF) band increased 19% (p-value <0.04). These results support a sympathetic activation during these tasks.
本文介绍了一项针对25名年轻健康受试者开展的研究，该研究测量了情绪应激期间心率变异性（HRV）指标的变化情况。采用改良版的特里尔社会应激测试（TSST）诱发急性情绪应激。TSST包含多项任务，包括记忆测试、应激预期、公开陈述以及算术任务。每项任务具有不同的要求条件，将受试者的情绪应激带至不同状态。在TSST之前进行了自生放松。在算术和记忆任务中，相对于放松阶段，观察到HRV指标存在显著差异。特别是在算术任务期间，平均心率增加了22%（p值<0.00001），极低频带功率增加了47%（p值<0.00001），低频（LF）带归一化功率增加了19%（p值<0.04）。这些结果支持在这些任务期间交感神经被激活。
