基于稳态视觉诱发电位的空间选择性注意研究中的刺激器选择
Stimulator Selection in SSVEP-Based Spatial Selective Attention Study.
作者信息
Xie Songyun, Liu Chang, Obermayer Klaus, Zhu Fangshi, Wang Linan, Xie Xinzhou, Wang Wei
机构信息
School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China.
School of Electronic Engineering and Computer Science, Technical University of Berlin, Berlin, Germany.
出版信息
Comput Intell Neurosci. 2016;2016:6410718. doi: 10.1155/2016/6410718. Epub 2016 Dec 1.
Steady-State Visual Evoked Potentials (SSVEPs) are widely used in spatial selective attention. In this process the two kinds of visual simulators, Light Emitting Diode (LED) and Liquid Crystal Display (LCD), are commonly used to evoke SSVEP. In this paper, the differences of SSVEP caused by these two stimulators in the study of spatial selective attention were investigated. Results indicated that LED could stimulate strong SSVEP component on occipital lobe, and the frequency of evoked SSVEP had high precision and wide range as compared to LCD. Moreover a significant difference between noticed and unnoticed frequencies in spectrum was observed whereas in LCD mode this difference was limited and selectable frequencies were also limited. Our experimental finding suggested that average classification accuracies among all the test subjects in our experiments were 0.938 and 0.853 in LED and LCD mode, respectively. These results indicate that LED simulator is appropriate for evoking the SSVEP for the study of spatial selective attention.
稳态视觉诱发电位（SSVEPs）在空间选择性注意研究中被广泛应用。在此过程中，发光二极管（LED）和液晶显示器（LCD）这两种视觉模拟器常用于诱发稳态视觉诱发电位。本文研究了这两种刺激器在空间选择性注意研究中诱发的稳态视觉诱发电位的差异。结果表明，LED能在枕叶诱发强烈的稳态视觉诱发电位成分，与LCD相比，诱发的稳态视觉诱发电位频率具有高精度和宽范围。此外，在频谱中观察到被注意频率和未被注意频率之间存在显著差异，而在LCD模式下，这种差异有限且可选频率也有限。我们的实验结果表明，在我们的实验中，所有受试对象在LED和LCD模式下的平均分类准确率分别为0.938和0.853。这些结果表明，LED模拟器适合用于诱发用于空间选择性注意研究的稳态视觉诱发电位。
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