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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Neurosci. | doi: 10.3389/fnins.2019.00744

Resolving the electroencephalogram correlates of rapid goal-directed chunking in frontal-parietal network

 Jiaoyan Pang1,  Xiaochen Tang1, Qiyang Nie2,  Markus Conci2, Peng Sun3, Haibin Wang4,  Junlong Luo5,  Jijun Wang1,  Chunbo Li1* and  Jing Luo6*
  • 1Shanghai Mental Health Center (SMHC), China
  • 2Ludwig Maximilian University of Munich, Germany
  • 3Shandong University of Finance and Economics, China
  • 4Huangshan University, China
  • 5Shanghai Normal University, China
  • 6Institute of Psychology, Chinese Academy of Sciences, China

Previous study has proved the specific role of prefrontal-parietal network in the rapid goal-directed chunking (RGDC), which could dissociate the prefrontal activity from the working memory demand or encoding difficulty. However, it remains unknown how the prefrontal and parietal cortices collaborate to accomplish RGDC. A novel experiment design using Chinese characters as materials wad conduced with eighteen undergraduate students (9 females, mean age = 22.4 years) while recoding electroencephalogram (EEG). The radical-level chunking, accomplished in a timely stringent way, made a strict contrast with the stroke-level chunking whose cognitive brain processing were far less coherent due to the irregular and unpredictable chunking procedure. Comparing to the stoke-level chunking, RGDC like radical-level chunking showed an early increase of gamma band synchronization over parietal and occipital cortices, followed by enhanced power in the beta-gamma band (25-38 Hz) over frontal areas in the regular versus irregular chunking conditions. We suggest that the posterior rhythmic activities in the gamma band may underlie the processes that are directly associated with perceptual manipulations of chunking, while the subsequent beta-gamma activation over frontal area appears to reflect the reinforcement of the selected rules over alternative options, which would differentiate goal-directed chunking from chunking processes accomplished in a more implicit manner.

Keywords: Beta-gamma oscillations, goal-directed chunking, prefrontal-parietal network, parallel-factor analysis model, time-frequency analysis

Received: 27 Jan 2019; Accepted: 05 Jul 2019.

Edited by:

Qiu Jiang, Southwest Normal University China

Reviewed by:

Annie C. Gilbert, McGill University, Canada
Zhonglu Zhang, Guangzhou University, China
Qiang Xing, Guangzhou University, China  

Copyright: © 2019 Pang, Tang, Nie, Conci, Sun, Wang, Luo, Wang, Li and Luo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Dr. Chunbo Li, Shanghai Mental Health Center (SMHC), Shanghai, 200013, China, chunbo_li@163.com
Dr. Jing Luo, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, Beijing Municipality, China, luoj@psych.ac.cn