Quantitative Measurement of Mental Stress in Daily Life

本研究以胃溃疡为研究对象，对日常生活中的心理应激进行了定量测量。本课题研究的第一年，研制了一种便携式数字生物信号监测装置，该装置可连续工作3天左右。本文还探讨了利用胃电图定量测量心理应激的可能性，并研制了一种高增益（80 dB）超低频（0 ~ 0.016Hz）放大器。在实验中，记录了日常生活场景中的胃电变化。实验结果表明，心理应激时胃电振幅增加，周期缩短，第二年用红外光测量胃蠕动，并研制了一套光测量系统 ...更多信息 私奔了首先，测量了胃对食物的无张力反射，并观察了饭后1小时的周期性运动，结果表明这种光测量系统对测量胃痉挛是有效的。去年，这种红外光测量系统得到了改进，因为发光二极管必须尽可能亮，而且它变得太热了。然后，开发了一种新的测量系统，其中该二极管在短时间内发光，并在这种情况下，反射光被收集到PC。实验采用饮水反应性胃蠕动实验、冰水浸手热应激实验和心算实验。结果表明，饮水时，胃张力反射光的亮度会发生相应的变化，说明该方法可用于监测胃张力。在热应激实验和心算实验中，虽然受试者的反应各不相同，但证实了可能由心理应激引起的胃异常收缩。因此，胃蠕动的测量可以作为应激评价的一个指标。少

In this research, the peristalsis of stomach was selected and quantitative measurement of mental stress in daily life was examined. This peristole was expected to be sensitive to the comparatively weak and chronic mental stress, while heart rate variability is popular for the measurement of strong and transient stress.In the first research year, a portable digital biological signal monitoring device was developed, which can continue to operate about 3 days. The possibility of the quantitative measurement of mental stress using the electrogastrogram (EGG) was also examined, and an amplifier with high gains (80dB) and ultra low frequency (0 - 0.016 Hz) was developed. In the experiment, EGG change was recorded in some scenes of daily life. As a result, it was proved that the amplitude of EGG increases and the period shortened when mental stress is applied on the subject.In the second year, infrared light was examined to measure the stomach peristole, and a light measurement system was dev … More eloped. First of all, atony reflection of the stomach for food was measured and the periodic movement was observed one hour after meals, and this light measurement system was shown to be effective to measure the stomach peristalsis.In the last year, this infrared light measurement system was improved, because light emitting diode has to be lighted as strong as possible, and it became too hot. Then, a new measurement system was developed in which this diode emits light in a short time and at this instance the reflection light is gathered into PC. In the experiment, the following experiments were conducted: Reactive stomach peristole for drinking-water, thermal stress experiment with hand soaking in iced water, and mental arithmetic experiment. Results showed that light luminance was observed to change according to stomach atony reflection when drinking-water, and it became clear that this method could monitor the stomach peristalsis. Abnormal contraction of stomach caused possibly by mental stress was confirmed, though the reaction is different in each subject on the thermal stress experiment and the mental arithmetic experiment. Therefore, it was shown that the measurement of stomach peristole can become an index to the stress evaluation. Less