Voda P, Kremláček J, Kordek D, Chutná M, Bezrouk A
Department of Medical Biophysics, Medical Faculty in Hradec Kralove, Charles University, Simkova 870, 500 03, Hradec Kralove, Czech Republic.
Department of Pathological Physiology, Medical Faculty in Hradec Kralove, Charles University, Simkova 870, 500 03, Hradec Kralove, Czech Republic.
Sci Rep. 2024 Feb 20;14(1):4244. doi: 10.1038/s41598-024-54776-5.
A rapid checkerboard pattern change is used to elicit pattern-reversal visual evoked potentials (PR VEPs). CRT or LCD monitors do not allow immediate reversal of the entire pattern. The study aimed to construct a new stimulator whose characteristics approximate an instantaneous reversal and verify whether the improvement is reflected in PR VEPs. A new stimulator using a matrix of 12 × 48 independent white square LEDs was designed and compared with LCDs and CRTs. The effect on the PR VEP peak times and amplitudes of N70, P100, and P140 waves was evaluated in ten subjects. The LED stimulator showed significantly better performance in the rate of change of illuminance, change of pattern, luminance settling and stability. The PR VEP amplitudes of N75, P100, and N140 did not show significant differences. The sum of interpeak amplitudes was significantly larger for the LCD than for the other monitors. The peak times of the waves evoked by the LED were shorter than those evoked by the LCD and CRT for the N75 wave and a check size of 30´. LED stimulators are a better alternative to CRTs for PR VEPs than current LCDs. LEDs also seem to be better than CRTs, but further research is necessary to obtain significant results.
快速棋盘格图案变化用于引出模式反转视觉诱发电位（PR VEPs）。阴极射线管（CRT）或液晶显示器（LCD）不允许整个图案立即反转。本研究旨在构建一种新的刺激器，其特性近似于瞬间反转，并验证这种改进是否体现在PR VEPs中。设计了一种使用12×48个独立白色方形发光二极管矩阵的新型刺激器，并将其与LCD和CRT进行比较。在10名受试者中评估了其对PR VEP峰值时间以及N70、P100和P140波振幅的影响。发光二极管刺激器在照度变化率、图案变化、亮度稳定和稳定性方面表现出明显更好的性能。N75、P100和N140的PR VEP振幅没有显著差异。LCD的峰间振幅总和明显大于其他显示器。对于N75波和30´的方格尺寸，发光二极管诱发的波的峰值时间比LCD和CRT诱发的波的峰值时间短。对于PR VEPs，发光二极管刺激器比当前的LCD是比CRT更好的选择。发光二极管似乎也比CRT更好，但需要进一步研究以获得显著结果。
