標題: Tonic and phasic EEG and behavioral changes induced by arousing feedback
作者: Lin, Chin-Teng
Huang, Kuan-Chih
Chao, Chih-Feng
Chen, Jian-Ann
Chiu, Tzai-Wen
Ko, Li-Wei
Jung, Tzyy-Ping
生物科技學系
電控工程研究所
Department of Biological Science and Technology
Institute of Electrical and Control Engineering
關鍵字: EEG;Drowsiness;Auditory Feedback;Brain dynamics;Driving safety;Independent component analysis (ICA)
公開日期: 15-Aug-2010
摘要: This study investigates brain dynamics and behavioral changes in response to arousing auditory signals presented to individuals experiencing momentary cognitive lapses during a sustained-attention task. Electroencephalographic (EEG) and behavioral data were simultaneously collected during virtual-reality (VR) based driving experiments, in which subjects were instructed to maintain their cruising position and compensate for randomly induced lane deviations using the steering wheel. 30-channel EEG data were analyzed by independent component analysis and the short-time Fourier transform. Across subjects and sessions, intermittent performance during drowsiness was accompanied by characteristic spectral augmentation or suppression in the alpha- and theta-band spectra of a bilateral occipital component, corresponding to brief periods of normal (wakeful) and hypnagogic (sleeping) awareness and behavior. Arousing auditory feedback was delivered to the subjects in half of the non-responded lane-deviation events, which immediately agitated subject's responses to the events. The improved behavioral performance was accompanied by concurrent spectral suppression in the theta- and alpha-bands of the bilateral occipital component. The effects of auditory feedback on spectral changes lasted 30 s or longer. The results of this study demonstrate the amount of cognitive state information that can be extracted from noninvasively recorded EEG data and the feasibility of online assessment and rectification of brain networks exhibiting characteristic dynamic patterns in response to momentary cognitive challenges. (C) 2010 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.neuroimage.2010.04.250
http://hdl.handle.net/11536/32294
ISSN: 1053-8119
DOI: 10.1016/j.neuroimage.2010.04.250
期刊: NEUROIMAGE
Volume: 52
Issue: 2
起始頁: 633
結束頁: 642
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