Emotional Memory Moderates the Relationship Between Sigma Activity and Sleep-Related Improvement in Affect

Frontiers in Psychology

article

Bethany J. Jones¹  Ahren B. Fitzroy¹  Rebecca M. C. Spencer¹ 

[1] Department of Psychological and Brain Sciences, University of Massachusetts, United States;Neuroscience and Behavior Program, University of Massachusetts, United States;Department of Psychology and Education, Mount Holyoke College, United States

关键词: sleep;    emotional memory;    affect;    sigma;    mood;   

DOI  :  10.3389/fpsyg.2019.00500

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

Sleep is essential for regulating mood and affect, and it also consolidates emotional memories. The mechanisms underlying these effects may overlap. Here, we investigated whether the influence of sleep on affect may be moderated by emotional memory consolidation. Young adults viewed 45 negative and 45 neutral pictures before taking an afternoon nap measured with polysomnography. Following the nap period, participants viewed the same pictures intermixed with novel ones and indicated whether they remembered each picture. Affect was measured with the Positive and Negative Affect Schedule (PANAS) at baseline before the initial picture viewing task, immediately following the initial picture viewing task, and following the nap. The ratio of positive to negative affect declined over the task period and recovered over the nap period. When controlling for pre-nap affect, NREM sigma activity significantly predicted post-nap affect. Memory for negative pictures moderated this relationship such that a positive association between sigma activity and affect occurred when memory was low but not when memory was high. These results indicate that emotional memory consolidation influences the relationship between nap physiology and mood.

【 授权许可】

CC BY