光刺激颜色和模式变化对脑电α波同步影响规律-《中国医学物理学杂志》

文章信息/Info

Title:: Effects of photostimulus color and mode variation on EEG alpha wave synchronization

作者:: 侯雨凡1; 覃玉荣1; 陈妮2; 1.广西大学计算机与电子信息学院，广西南宁 530004； 2.广西医科大学生命科学研究院，广西南宁 530021

Author(s):: HOU Yufan1; QIN Yurong1; CHEN Ni2; 1.School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China 2. Life Sciences Institute, Guangxi Medical University, Nanning 530021, China

Keywords:: Keywords: photostimulus color binocular homo-frequency binocular dual-frequency brain alpha wave phase synchronization

摘要:: 针对α波同步和刺激颜色是否相关，提出用双眼同频和双眼双频刺激模式，频率在低频（fI±3） Hz、中频（2fI±3） Hz和高频（4fI±3） Hz取值（颜色取红、绿、蓝，fI为α波自发频率），以归一化香农熵为评价α波同步程度指标，研究刺激模式和颜色组合变化对α波同步影响。结果表明：在低、中或高频段内，在双眼双频或双眼同频模式下，无论是红、绿或蓝光刺激，α波相位同步程度随刺激频率变化均呈“阿诺德舌头”形状，且红色>绿色>蓝色（同步程度）；在双眼双频及不同颜色光作用下，一只眼刺激频率改变，则另一只眼的α波同步受到影响。该结果为认知障碍疾病诊断和治疗新方法研究提供新思路，刺激频率、颜色和模式组合可解决脑机接口技术的刺激频率选择局限性问题。

Abstract:: Abstract: Whether alpha wave synchronization is correlated with stimulus color is explored under the stimulus modes of binocular homo-frequency and binocular dual-frequency in low-, medium- or high-frequency ranges which are (fI±3), (2fI±3), and (4fI±3) Hz, respectively (colors being red, green, blue, where fI represents the spontaneous alpha wave frequency). Normalized Shannon entropy is served as an indicator to evaluate the degree of alpha wave synchronization, and the effects of stimulus modes and color combinations on alpha wave synchronization are investigated. The results indicate that under the stimulus modes of binocular homo-frequency and binocular dual-frequency in the low-, medium- or high-frequency ranges, regardless of red, green or blue light, the degree of alpha wave phase synchronization varies in an "Arnolds tongue" shape, with red > green > blue (in term of synchronization degree). Under the stimulus of binocular dual-frequency and different color lights, a change in the stimulus frequency of one eye affects the alpha wave synchronization of the other eye. These findings offer new insights for the diagnosis and treatment of cognitive impairment, and the combination of stimulus frequency, color and mode can address limitations in stimulus frequency selection for brain-computer interface technology.