Effect of green odor on physiological responses to mental stress in humans

我们研究了绿色气味(等量的(Z)-3-己烯醇和（E)-2-己烯醇稀释至0.03% （w/w）的混合物）对人类受试者对两种轻度精神压力的各种生理反应的影响。Stroop色字测试显著降低手指血流量和皮肤温度，提高手掌出汗率。吸入绿色气味后，这些反应明显减弱。此外，绿色气味倾向于降低精神应激后血浆ACTH水平。在病房隔离的24小时内，绿色气味喷雾仅在睡眠时间显著降低受试者的直肠温度。在隔离结束时，绿色气味处理显著提高了血浆葡萄糖水平。这些结果表明，吸入绿色气味很可能会减弱人类对急性轻度精神压力的生理反应。

We investigated the influence of green odor (a mixture of equal amounts of (Z)-3-hexenol and (E)-2-hexenal diluted to 0.03% (w/w)) administration on various physiological responses to two types of mild mental stress in human subjects. Stroop Color-Word Test significantly reduced finger blood flow and cutaneous temperature, and raised palmer sweating rate. These responses were clearly attenuated by green odor inhalation. In addition, green odor tended to depress plasma ACTH level after the mental stress. During 24-h isolation in a hospital room, green odor spray significantly lowered rectal temperature of subjects only during sleeping time. At the end of isolation, plasma glucose level was significantly elevated by green odor treatments. These results suggest a good possibility that green odor inhalation may attenuate physiological responses to acute mild mental stress in humans.