Annu Int Conf IEEE Eng Med Biol Soc. 2022 Jul;2022:4093-4096. doi: 10.1109/EMBC48229.2022.9871495.
Human body odors (HBOs) are powerful stimuli that can affect emotional, cognitive and behavioral processes. However, the characterization of the physiological response to HBOs is still to be fully investigated. Here, we analyzed the self-assessed emotion perception and the EEG event-related potentials (ERP) on 17 healthy young women during a simultaneous visual-olfactory stimulation. Particularly, we evaluated the effect of happiness and fear HBO on the amplitude of ERP waveforms elicited by neutral face processing. In addition, we evaluated the subjective valence and arousal perception of the presented neutral faces by means of the self-assessment-manikin test. We observed a significant increase in the amplitude of the late positive potential (LPP) for central left sites (i.e., C3) during the administration of HBOs with respect to clean air. On the other hand, we did not observe any significant change in the subjective valence and arousal scores as well as for the early components of the ERP (i.e., P100, N170, Vertex-Positive-Potential). Our preliminary results suggest that fear and happiness HBO can induce a protracted increase in the LPP, and possibly reflect an automatic and sustained engagement with emotionally significant content.
人体气味（HBOs）是一种强大的刺激物，可以影响情绪、认知和行为过程。然而，对 HBOs 生理反应的特征描述仍有待充分研究。在这里，我们在 17 名健康年轻女性中分析了自我评估的情绪感知和脑电图事件相关电位（ERP），同时进行视觉-嗅觉刺激。特别是，我们评估了快乐和恐惧 HBO 对中性面孔处理引发的 ERP 波形幅度的影响。此外，我们通过自我评估人体模型测试评估了呈现的中性面孔的主观效价和唤醒感知。与清洁空气相比，我们观察到在 HBOs 给药期间中央左侧部位（即 C3）的晚期正电位（LPP）的幅度显着增加。另一方面，我们没有观察到 ERP 的早期成分（即 P100、N170、Vertex-Positive-Potential）以及主观效价和唤醒评分有任何显着变化。我们的初步结果表明，恐惧和快乐 HBO 可以诱导 LPP 的延长增加，并且可能反映出对情感重要内容的自动和持续参与。
