葡京集团app官网_葡京集团网站app_欢迎您

Control of electron tunnelling by fine band engineering of semiconductor ...
A high-performance ultraviolet solar-blind photodetector based on a beta-...
Broadband Laser Doppler Frequency Shift Emulator for Satellite Laser Comm...
Effect of photonic crystals on the light extraction of GaN-based LED for ...
Quantum oscillations in a two-dimensional electron system under low-frequ...
Edge-Epitaxial Growth of InSe Nanowires toward High-Performance Photodete...
The combined effects of anodization parameters on morphological of the po...
Instantaneous microwave frequency measurement based on non-sliced broadba...
半导体学报2020年第1期目次
On-chip integrated optical switch based on polymer waveguides
官方微信
友情链接

Effects of stimulation frequency and stimulation waveform on steady-state visual evoked potentials using a computer monitor

2020-01-09

 

Author(s): Chen, XG (Chen, Xiaogang); Wang, YJ (Wang, Yijun); Zhang, SG (Zhang, Shangen); Xu, SP (Xu, Shengpu); Gao, XR (Gao, Xiaorong)

Source: JOURNAL OF NEURAL ENGINEERING Volume: 16 Issue: 6 Article Number: 066007 DOI: 10.1088/1741-2552/ab2b7d Published: DEC 2019

Abstract: Objective. A visual stimulator plays a vital part in brain-computer interfaces (BCIs) based on steady-state visual evoked potential (SSVEP). The properties of visual stimulation, such as frequency, color, and waveform, will influence SSVEP-based BCI performance to some extent. Recently, the computer monitor serves as a visual stimulator that is widespread in SSVEP-based BCIs because of its great flexibility in generating visual stimuli. However, stimulation properties based on a computer monitor have received very little attention. For a better comprehension of SSVEPs, this study explored the stimulation effects of waveforms and frequencies, when evoking SSVEPs through a computer monitor. Approach. This study utilized the approximation methods to realize sine- and square-wave temporal modulations at 18 stimulation frequencies ranging from 6 to 40 Hz on a conventional 120 Hz LCD screen. We collected electroencephalogram (EEG) datasets from 12 healthy subjects and compared the signal-to-noise ratios (SNRs), amplitudes, and topographic mapping of SSVEPs evoked by these two temporal modulation flickers (sine- and square-wave). In addition, a BCI experiment with two nine-target BCIs (i.e. low-frequency BCI and high-frequency BCI) was implemented to compare the two stimulation waveforms in terms of BCI performance. Main results. For both sine- and square-wave stimulation conditions, strong SSVEPs over the occipital area were observed for each stimulation frequency. SSVEP amplitudes at the stimulation frequency exhibited a global peak in the low-frequency band. The second harmonic SSVEP frequency-response functions showed the largest amplitude at 6 Hz and fell sharply for higher frequencies. In the BCI experiment, the classification performance of the square-wave stimuli was notably higher than that of the sine-wave stimuli when using shorter data lengths. Significance. These results suggested that the square-wave flicker was more efficient at implementing high-speed BCIs based on SSVEP when using a computer monitor as a visual stimulator.

Accession Number: WOS:000503792000005

PubMed ID: 31220820

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Chen, Xiaogang                  0000-0002-5334-1728

ISSN: 1741-2560

eISSN: 1741-2552

Full Text: https://iopscience.iop.org/article/10.1088/1741-2552/ab2b7d



关于我们
下载视频观看
联系方式
通信地址

北京市海淀区清华东路甲35号 北京912信箱 (100083)

电话

010-82304210/010-82305052(传真)

E-mail

semi@semi.ac.cn

交通地图
版权所有 ? 葡京集团app官网

备案号:京ICP备05085259号 京公网安备110402500052 中国科学院半导体所声明

Baidu
sogou