Earthquake experience interference effects in a modified Stroop task: an ERP study.
The effects of the modified Stroop task on ERP were investigated in 20 subjects who had experienced the Sichuan earthquake and a matched control group. ERP data showed that Incongruent stimuli elicited a more negative ERP deflection (N300-450) than did Congruent stimuli between 300 and 450 ms post-stimulus in the earthquake group but not found in the control group, and the N300-450 might reflect conflict monitor (the information of color and meaning do not match) in the early phase of perception identification due to their sensitivity to the external stimulus. Then, Incongruent stimuli elicited a more negative ERP deflection than did Congruent stimuli between 450 and 650 ms post-stimulus in both the groups. Dipole source analysis showed that the N450-650 was mainly generated in the ACC contributed to this effect in the control group, which might be related to monitor and conflict resolution. However, in the earthquake group, the N450-650 was generated in the thalamus, which might be involved in inhibiting and compensating of the ACC which may be related to conflict resolution process.
Wei
Dongtao
D
Key Laboratory of Cognition and Personality (SWU), Ministry of Education, Chongqing 400715, China; School of Psychology, Southwest University, Chongqing 400715, China.
Qiu
Jiang
J
Key Laboratory of Cognition and Personality (SWU), Ministry of Education, Chongqing 400715, China; School of Psychology, Southwest University, Chongqing 400715, China. Electronic address: qiuj318@swu.edu.cn.
Tu
Shen
S
Key Laboratory of Cognition and Personality (SWU), Ministry of Education, Chongqing 400715, China; School of Psychology, Southwest University, Chongqing 400715, China.
Tian
Fang
F
Key Laboratory of Cognition and Personality (SWU), Ministry of Education, Chongqing 400715, China; School of Psychology, Southwest University, Chongqing 400715, China.
Su
Yanhua
Y
Key Laboratory of Cognition and Personality (SWU), Ministry of Education, Chongqing 400715, China; School of Psychology, Southwest University, Chongqing 400715, China.
Luo
Yuejia
Y
State Key Laboratory of Cognitive Neuroscience and Learning (BNU), Beijing, China.
D000293:Adolescent; D001921:Brain / Q000503:physiopathology*; D003071:Cognition / Q000502:physiology; D055866:Earthquakes; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D013313:Stress Disorders, Post-Traumatic / Q000209:etiology / Q000503:physiopathology*; D057190:Stroop Test; D055815:Young Adult