ISSN 1671-3710
CN 11-4766/R
主办：中国科学院心理研究所
出版：科学出版社

心理科学进展 ›› 2017, Vol. 25 ›› Issue (suppl.): 43-43.

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Individual alpha activity predicts perceptual states of color-motion binding

 Yanyu Zhang a,b,c,d,e; Yifei Zhang a,b,c,d,e; Fang Fang a,b,c,d,e   

  1.  a School of Psychological and Cognitive Sciences, Peking University, Beijing 100871, PR China
    b Key Laboratory of Machine Perception (Ministry of Education), Peking University, Beijing 100871, PR China
    c Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing 100871, PR China
    d Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, PR China
    e PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing 100871, PR China
  • 出版日期:2017-08-26 发布日期:2017-08-12
  • 基金资助:
     

 

    

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  • Online:2017-08-26 Published:2017-08-12
  • Supported by:
     

摘要：  PURPOSE: Integrating different visual features into a coherent object is an essential issue for the visual system which is referred as the binding problem. Previous studies have shown that early visual cortex plays a very important role in the active binding of color and motion (Zhang et al., 2014; 2016). However, our knowledge of the relationship between the binding problem and the neural oscillations is still incomplete.
METHODS: We explored the role of neural oscillations in active color-motion binding with an illusory misbinding of color and motion (Wu et al., 2004). We probed the neural oscillations of the color-motion misbinding using electroencephalogram (EEG), and transcranial alternating current stimulation (tACS). Specifically, we presented a color-motion misbinding stimulus to subjects and recorded EEG signals while they reported whether they perceived the misbinding or the correct binding state.
RESULTS: Results showed that alpha oscillatory activity in left occipital area increased when subjects reported the correct binding state, relative to the misbinding state. Moreover, we used tACS over left posterior area to enhance individual alpha activity and found an increase in the duration of the correct binding state. Furthermore, we also manipulated alpha frequency to investigate the behavioral changes at different frequencies. We found that delivering a higher frequency than individual alpha frequency that we got from EEG signal would increase the switching rate between the misbinding and the correct binding state and vice versa.
CONCLUSIONS: We demonstrated that alpha activity can determine the color-motion binding and individual alpha activity causally shaped the perceptual states of the color-motion binding. Our results provide new insight for the neural mechanisms of active color-motion binding in human visual cortex.

关键词:  Brain oscillations, Individual alpha frequency (IAF), Electroencephalogram (EEG), Transcranial alternating current stimulation (tACS), Color-motion misbinding

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