Theta and alpha oscillations linked to risk identifications

doi:10.1016/j.brainres.2009.02.077

CORC > 北京大学 > 心理与认知科学学院

	Theta and alpha oscillations linked to risk identifications
	Qin, Jungang ; Lee, Tatia M. C. ; Han, Shihui
刊名	脑研究
	2009
关键词	Alpha EEG Risk Theta Wavelet analysis EVENT-RELATED SYNCHRONIZATION ENVIRONMENTAL RISKS CINGULATE CORTEX NEURAL BASIS EEG ALPHA SELF DESYNCHRONIZATION BAND ASYMMETRIES MECHANISMS
DOI	10.1016/j.brainres.2009.02.077
英文摘要	our recent functional MRI and event-related potential studies suggest that neural mechanisms underlying identifications of environmental and personal risks are characterized by distinct neural structures and time courses. The current work further investigated the role of non-phase locked activity in dissociation of the neural processes of environmental and personal risks. We recorded electroencephalogram (EEG) from healthy adults when they identified risky and safe environmental or personal events depicted in words or phrases. Event-related synchronization (ERS) and desynchronization (ERD) in association with risky and safe environmental and personal events were calculated using Morlet's wavelet analysis. We found that, relative to the identification of safe environmental events, the identification of risky environmental events induced increased theta band power at 260-380 ms over the frontal cortex and increased alpha band power after 700 ms with a wide scalp distribution. Moreover, theta band powers associated with the identification of risky environmental events correlated positively with subjective ratings of the risk degree of environmental events. In contrast, the identification of risky personal events was linked to decreased alpha band power at 740-900 ms with a wide scalp distribution compared with the identification of safe personal events. Our findings indicate that theta and alpha band neural oscillations are involved in differentiation between environmental and personal risks. (C) 2009 Elsevier B.V. All rights reserved.; Neurosciences; SCI(E); 7; ARTICLE; 125-134; 1269
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/245853]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Qin, Jungang,Lee, Tatia M. C.,Han, Shihui. Theta and alpha oscillations linked to risk identifications[J]. 脑研究,2009.
APA	Qin, Jungang,Lee, Tatia M. C.,&Han, Shihui.(2009).Theta and alpha oscillations linked to risk identifications.脑研究.
MLA	Qin, Jungang,et al."Theta and alpha oscillations linked to risk identifications".脑研究 (2009).