Abstract：
Nostalgia, a self-related emotion characterized by its bittersweet yet predominantly positive nature, plays a vital role in shaping individual psychology and behavior. This includes impacts on mental and physical health, behavioral patterns, and cognitive functions. However, higher levels of trait nostalgia may be linked to potential adverse outcomes, such as increased loneliness, heightened neuroticism, and more intense experiences of grief. The specific electroencephalography (EEG) feature associated with individuals exhibiting trait nostalgia, and how it differs from others, remains an area of uncertainty. To address this, our study employs microstate analysis to investigate the differences in resting-state EEG between individuals with varying levels of trait nostalgia. We assessed trait nostalgia in 63 participants using the Personal Inventory of Nostalgia and collected their resting-state EEG signals with eyes closed. The results of the regression analysis indicate a significant correlation between trait nostalgia and the temporal characteristics of microstates A, B, and C. Further, the occurrence of microstate B was significantly more frequent in the high trait nostalgia group than in the low trait nostalgia group. Independent samples t-test results showed that the transition probability between microstates A and B was significantly higher in the high trait nostalgia group. These results support the hypothesis that trait nostalgia is reflected in the resting state brain activity. Furthermore, they reveal a deeper sensory immersion in nostalgia experiences among individuals with high levels of trait nostalgia, and highlight the critical role of self-referential and autobiographical memory processes in nostalgia.
摘要：
怀旧,一种自我相关的情绪，其特征是苦乐参半但主要是积极的性质，在塑造个体心理和行为中起着至关重要的作用。这包括对身心健康的影响，行为模式，和认知功能。然而,更高水平的特质怀旧可能与潜在的不良后果有关，比如增加孤独，提高了神经质,和更强烈的悲伤体验。与表现出特质怀旧的个体相关的特定脑电图（EEG）特征，以及它与其他人的不同之处，仍然是一个不确定的领域。为了解决这个问题，我们的研究采用微状态分析来调查具有不同特质怀旧情绪的个体之间静息态脑电图的差异.我们使用怀旧个人清单评估了63名参与者的特质怀旧，并收集了他们闭眼的静息状态EEG信号。回归分析的结果表明，特质怀旧与微观状态A的时间特征之间存在显着相关性，B,C.进一步，微状态B的发生在高特质怀旧组中明显高于低特质怀旧组。独立样本t检验结果表明，高性状怀旧组的微观状态A和B之间的转移概率明显较高。这些结果支持以下假设：特质怀旧情绪反映在静息状态的大脑活动中。此外，它们揭示了具有高度特质怀旧的个体在怀旧体验中更深的感觉沉浸，并强调了自指和自传记忆过程在怀旧中的关键作用。
