Lv Bin, Su Chang, Yang Lei, Wu Tongning
China Telecommunication Technology Labs - Terminals, China Academy of Information and Communication Technology, No. 52, Huayuanbei Road, Haidian District, Beijing 100191, China.
China Telecommunication Technology Labs - Terminals, China Academy of Information and Communication Technology, No. 52, Huayuanbei Road, Haidian District, Beijing 100191, China.
Int J Psychophysiol. 2017 Mar;113:17-22. doi: 10.1016/j.ijpsycho.2017.01.003. Epub 2017 Jan 10.
The physiological responses to human thermal stimulation have been widely investigated, but most of them are mainly concerned about the whole body thermal stimulation. In this study, we investigated the effects of stimulus mode and ambient temperature on cerebral responses during local thermal stimulation on hand. The left hands were stimulated by metal thermostat based and thermostatic water based stimulators at different stimulated temperatures (38°C, 40°C, 42°C and 44°C) and different ambient temperatures (25°C and 32°C). EEG data were recorded over the whole brain during the experiments. Then the statistical comparisons were conducted on the EEG relative power among different experimental sessions. We observed that EEG activities were alternated between thermal stimulated periods and the baseline in all four frequency bands. And there was a higher percentage of delta band power in the right temporal and parietal regions under the ambient temperature of 32°C while compared to 25°C. In addition, the theta band activity under the metal based stimulation showed significantly higher EEG relative power than that under the water based stimulation over the whole brain. Compared with the water based stimulation, there was a lower EEG relative power of the beta band activity during the metal based stimulation in the bilateral frontal and right temporal regions. The experimental results suggested that the neural physiological responses in different EEG frequency bands were sensitive to different influence factors during the local hand thermal stimulation.
人类对热刺激的生理反应已得到广泛研究，但其中大多数主要关注全身热刺激。在本研究中，我们调查了刺激模式和环境温度对手部局部热刺激期间大脑反应的影响。使用基于金属恒温器和基于恒温水的刺激器，在不同刺激温度（38°C、40°C、42°C和44°C）和不同环境温度（25°C和32°C）下对左手进行刺激。实验过程中记录全脑的脑电图（EEG）数据。然后对不同实验阶段的EEG相对功率进行统计比较。我们观察到，在所有四个频段中，EEG活动在热刺激期和基线之间交替。与25°C相比，在32°C环境温度下，右侧颞叶和顶叶区域的δ频段功率百分比更高。此外，在全脑范围内，基于金属的刺激下的θ频段活动显示出比基于水的刺激下显著更高的EEG相对功率。与基于水的刺激相比，在双侧额叶和右侧颞叶区域，基于金属的刺激期间β频段活动的EEG相对功率较低。实验结果表明，在手部局部热刺激期间，不同EEG频段的神经生理反应对不同影响因素敏感。
