Associations between cortisol awakening response and resting electroencephalograph asymmetry

PeerJ

article

Hongxia Duan¹  Huihua Fang¹  Yuling Zhang²  Xia Shi³  Liang Zhang⁴ 

[1] Center for Brain Disorder and Cognitive Science, Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen University;Zaoyang First People’s Hospital;Department of Psychology, Tianjin University of Technology and Education;Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences

关键词: Cortisol awakening response;    EEG;    Alpha;    Asymmetry;   

DOI  :  10.7717/peerj.7059

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The cortisol awakening response (CAR), a rapid cortisol rise in the morning after awakening, has been proposed to provide energy to cope with daily demands and suggested to be associated with brain functions. Electroencephalogram (EEG) asymmetry studies have implicated asymmetric cortical activation, especially in frontal cortex, in approach-withdrawal motivation. In this study, we examined the relationship between the CAR and lateralized cortical activity under rest in 55 university male students. Saliva samples were collected at 0, 15, 30 and 60 min after awakening on the two consecutive workdays. The lateralized cortical activity at frontocentral sites was examined by alpha asymmetry score. The results showed that a higher CAR was positively associated with alpha asymmetry score, which indicated that the higher CAR is linked with more left-sided cortical activity at frontocentral sites under resting state. This association still existed even after controlling psychological and sleep quality variables. These results suggested that appropriately mobilizing energy resource storage after awakening revealed as CAR might be associated with goal-directed approach tendencies before any eventual stressful situation, characteristic of more left than right resting-state frontocentral cortical activity.

【 授权许可】

CC BY