Sia Angelia, Ho Roger
Annu Int Conf IEEE Eng Med Biol Soc. 2017 Jul;2017:2546-2549. doi: 10.1109/EMBC.2017.8037376.
Recent studies have shown that pleasant and unpleasant emotions could be detected through functional Near-Infrared Spectroscopy (fNIRS). This study investigates the prefrontal cortical activation in human subjects while they were viewing urban and garden scenes. A multi-channel continuous wave fNIRS system was used to record the prefrontal cortical activations from seven subjects. During the data collection, the subjects viewed 40 trials of video clips. In each trial, the subjects viewed a video of randomized urban or garden scenes for 30s followed by 30s of idle scene which showed a dark blue progress bar on black background on the screen. NIRS-SPM is employed to work out the changes of hemoglobin response and the prefrontal cortical activations were generated using group analysis based on the contrasts of urban versus idle, garden versus idle and urban versus garden. The activation for the contrast of urban versus garden showed an increase of oxy-hemoglobin on the right area of the prefrontal cortex with p <; 0.05. This preliminary result showed that the garden scene might provide a pleasant and less stressful experience as compared to the urban scene for subjects. This suggests the possibility of using a NIRS-based Brain-Computer Interface to detect subject preferences of different scenes.
最近的研究表明，通过功能近红外光谱技术（fNIRS）可以检测出愉快和不愉快的情绪。本研究调查了人类受试者在观看城市和花园场景时前额叶皮层的激活情况。使用多通道连续波fNIRS系统记录了7名受试者前额叶皮层的激活情况。在数据收集过程中，受试者观看了40次视频片段。在每次试验中，受试者观看一段随机播放的城市或花园场景视频30秒，然后是30秒的空闲场景，屏幕上黑色背景显示深蓝色进度条。采用NIRS-SPM计算血红蛋白反应的变化，并基于城市与空闲、花园与空闲以及城市与花园的对比，通过组分析生成前额叶皮层的激活情况。城市与花园对比的激活显示前额叶皮层右侧区域的氧合血红蛋白增加，p<0.05。这一初步结果表明，与城市场景相比，花园场景可能为受试者提供一种愉快且压力较小的体验。这表明使用基于近红外光谱的脑机接口来检测受试者对不同场景偏好的可能性。
