Functional modulation of power-law distribution in visual perception

作     者：Masanori Shimono Takashi Owaki Kaoru Amano Keiichi Kitajo Tsunehiro Takeda 

作者机构：Laboratory for Biological Complex Systems Department of Complexity Science and Engineering Graduate School of Frontier Science The University of Tokyo 5-1-5 Kashiwanoha Kashiwa-shi Chiba 277-8561 Japan Sensory and Motor Research Group Human and Information Science Laboratory NTT Communication Science Laboratories 3-1 Morinosato Wakamiya Atsugi-shi Kanagawa 243-0198 Japan Laboratory for Dynamics of Emergent Intelligence RIKEN Brain Science Institute 2-1 Hirosawa Wako Saitama 351-0198 Japan 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2007年第75卷第5期

页      面：051902-051902页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

主　　题：RANGE TEMPORAL CORRELATIONS SELF-ORGANIZED CRITICALITY SCALING BEHAVIOR HUMAN BRAIN OSCILLATIONS PERFORMANCE CORTEX ALPHA THETA EEG 

摘      要：Neuronal activities have recently been reported to exhibit power-law scaling behavior. However, it has not been demonstrated that the power-law component can play an important role in human perceptual functions. Here, we demonstrate that the power spectrum of magnetoencephalograph recordings of brain activity varies in coordination with perception of subthreshold visual stimuli. We observed that perceptual performance could be better explained by modulation of the power-law component than by modulation of the peak power in particular narrow frequency ranges. The results suggest that the brain operates in a state of self-organized criticality, modulating the power spectral exponent of its activity to optimize its internal state for response to external stimuli.