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Advances in Psychological Science    2015, Vol. 23 Issue (6) : 1000-1008     DOI: 10.3724/SP.J.1042.2015.01000
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An Important Neural Indicator of Measuring Depression: The Asymmetry of Resting Frontal Activity
LIU Lei1,2,4; ZHOU Renlai1,2,3,4,5
(1 Department of Psychology, School of Social and Behavioral Sciences, Nanjing University, Nanjing 210023, China) (2 Beijing Key Lab of Applied Experimental Psychology, School of Psychology, Beijing Normal University, Beijing 100875, China) (3 State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China) (4 Research Center of Emotion Regulation, Beijing Normal University, Beijing 100875, China) (5 Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing 100875, China)
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Abstract  

The asymmetry of resting frontal activity was examined when differential activation of the alpha frequency band of left and right frontal cortex was found, i.e., frontal EEG lateralization. It had been showed largely that resting frontal EEG asymmetry was related to depression. Based on worldwide studies, we found that there was a negative correlation between resting frontal EEG asymmetry and depression level. Compared with individuals without depressive symptoms, those with depressive symptoms showed enhancement of right frontal activity. For depressive individuals, resting frontal EEG asymmetry was stable in the short and long run. That is to say, resting frontal EEG asymmetry predicted the risk of depression, which showed that frontal EEG asymmetry could be regarded as a neural index of depressive symptoms. In addition, resting frontal EEG asymmetry reflected the activation of dorsolateral prefrontal cortex, which might play a role in developing depressive symptoms. Future studies should focus on the neural mechanism of resting frontal EEG asymmetry predicting depression, the application of frontal EEG symmetry predicting depressive symptoms, and training methods (e.g., mindfulness training) to change the resting frontal EEG asymmetry of depressive individuals, relieving the depression level.

Keywords depression      frontal EEG lateralization      frontal EEG asymmetry      neural index     
Corresponding Authors: ZHOU Renlai, E-mail: rlzhou@nju.edu.cn   
Issue Date: 25 June 2015
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LIU Lei,ZHOU Renlai. An Important Neural Indicator of Measuring Depression: The Asymmetry of Resting Frontal Activity[J]. Advances in Psychological Science, 2015, 23(6): 1000-1008.
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http://journal.psych.ac.cn/xlkxjz/EN/10.3724/SP.J.1042.2015.01000     OR     http://journal.psych.ac.cn/xlkxjz/EN/Y2015/V23/I6/1000
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