SNR analysis of high-frequency steady-state visual evoked potentials from the foveal and extrafoveal regions of Human Retina

Fang Cheng Lin*, John K. Zao, Kuan Chung Tu, Yijun Wang, Yi-Pai Huang, Che Wei Chuang, Hen Yuan Kuo, Yu Yi Chien, Ching Chi Chou, Tzyy Ping Jung

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

30 Scopus citations

Abstract

With brain-computer interface (BCI) applications in mind, we analyzed the amplitudes and the signal-to-noise ratios (SNR) of steady-state visual evoked potentials (SSVEP) induced in the foveal and extra-foveal regions of human retina. Eight subjects (age 20-55) have been exposed to 2° circular and 16°-18° annular visual stimulation produced by white LED lights flickering between 5Hz and 65Hz in 5Hz increments. Their EEG signals were recorded using a 64-channel NeuroScan system and analyzed using non-parametric spectral and canonical convolution techniques. Subjects' perception of flickering and their levels of comfort towards the visual stimulation were also noted. Almost all subjects showed distinctively higher SNR in their foveal SSVEP responses between 25Hz and 45Hz. They also noticed less flickering and felt more comfortable with the visual stimulation between 30Hz and 45Hz. These empirical evidences suggest that lights flashing above the critical flicker fusion rates (CFF) of human vision may be used as effective and comfortable stimuli in SSVEP BCI applications.

Original languageEnglish
Title of host publication2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2012
Pages1810-1814
Number of pages5
DOIs
StatePublished - 14 Dec 2012
Event34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012 - San Diego, CA, United States
Duration: 28 Aug 20121 Sep 2012

Publication series

NameProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
ISSN (Print)1557-170X

Conference

Conference34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012
CountryUnited States
CitySan Diego, CA
Period28/08/121/09/12

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    Lin, F. C., Zao, J. K., Tu, K. C., Wang, Y., Huang, Y-P., Chuang, C. W., Kuo, H. Y., Chien, Y. Y., Chou, C. C., & Jung, T. P. (2012). SNR analysis of high-frequency steady-state visual evoked potentials from the foveal and extrafoveal regions of Human Retina. In 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2012 (pp. 1810-1814). [6346302] (Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS). https://doi.org/10.1109/EMBC.2012.6346302