The influence of cognitive tasks on different frequencies steady-state visual evoked Potentials

被引：26
|
作者：
Wu, Zhenghua [1 ]
Yao, Dezhong [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Life Sci & Technol, Ctr Neuroinformat, Chengdu 610054, Peoples R China
来源：
BRAIN TOPOGRAPHY | 2007年 / 20卷 / 02期
基金：
中国国家自然科学基金;
关键词：
steady-state visual evoked potential (SSVEP); steady-state probe topography (SSPT); memory task; flicker;
D O I：
10.1007/s10548-007-0035-0
中图分类号：
R74 [神经病学与精神病学];
学科分类号：
摘要：
Previous studies suggested that there exists different neural networks for different frequency bands of steady-state visual evoked potential (SSVEP). What is the effect of the same cognitive task on different frequency SSVEPs? In this work, when a subject was conducting a graded memory task, a 8.3 or 20 Hz flicker was used as a background stimulation. The recorded EEGs were analyzed by the method of steady-state probe topography (SSPT), the results showed that SSVEPs under these two flicker conditions were similar to each other in the various stages of memory process, and were similar to the result of a high alpha band SSVEP as reported before. However, the SSVEP amplitude and latency in the lower frequency band is more clear and stable than that in the higher frequency band. These results suggest that the same cognitive task affects the different frequency SSVEP in a similar way, and the low frequency flicker is a better choice than the high frequency one in such as working memory study.
引用
收藏
页码：97 / 104
页数：8
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