Training of frontoparietal alpha rhythm enhances episodic memory performance and modulates default mode network

• Main Authors: Yan-ZhouChen, 陳彥州
• Other Authors: Fu-Zen Shaw
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/46263344469799830086

碩士 === 國立成功大學 === 心理學系認知科學碩士班 === 102 === Memory is always an interesting issue and plays an important role in the cognitive process. Numerous kinds of alpha neurofeedback trainings on memory performance have been widely studied over the past years. However, large inconsistencies, including the memory performance and training parameters, exist in the alpha neurofeedback trainings of previous studies. In the present study, a self-developed neurofeedback apparatus was sued to enhance the alpha power of particular brain areas. Episodic memory paradigm with more-demands was used. Electroencephalographic map and functional magnetic resonance imaging (fMRI) were used to assess possible clues on changes of episodic memory. After 12 sessions of alpha feedback trsainings within 3 weeks, the alpha neurofeedback group showed a significant higher accuracy in the episodic memory task compared to the control group receiving feedback of random frequency bandwidths. The alpha power was primarily elicted in the frontoparietal areas. Improvement of accuracy of the episodic memory task showed a significant positive correlation with the increment of alpha powers before and after the neurofeedback training. Preliminary results of the fMRI experiment revealed that blood-oxygen-level-detection activity or connectivity of the default mode network (DMN) were significantly altered during recognition phase of the episodic memory and alpha-reactivated mode in the alpha neurofeedback training group. Our results indicate that training of the frontoparietal alpha rhythm significantly enhance episodic memory. The enhancement of episodic memory in the alpha traing group may be related to alter the DMN modulation.