Rebaï M, Bonnet C
Percept Psychophys. 1989 Dec;46(6):537-45. doi: 10.3758/bf03208150.
The effects of adaptation to the visual contrast of a counterphase grating were studied with visual evoked potentials (VEPs). The spatial frequency of the grating was 4 cpd, and its temporal frequency was 4 or 12 Hz. Steady-state VEPs were analyzed through an FFT (fast Fourier transform) algorithm. In the first experiment, contrast thresholds rose strongly just after the end of adaptation and declined regularly over time. The VEPs recorded in the medio-occipital lead showed an initial decrease in amplitude after adaptation, followed by an enhancement well above the preadaptation level and then a return to that level. The paradoxical enhancement of the VEP was found at both high and low contrast in both the medio-occipital lead and the right temporal lead of a right-handed subject. The left temporal leads showed a VEP enhancement at high contrast and a decline at a low value.
利用视觉诱发电位（VEP）研究了对反相光栅视觉对比度适应的影响。光栅的空间频率为4周/度，时间频率为4或12赫兹。通过快速傅里叶变换（FFT）算法分析稳态VEP。在第一个实验中，对比度阈值在适应结束后立即大幅上升，并随时间有规律地下降。在枕中导联记录的VEP显示，适应后振幅最初下降，随后增强至远高于适应前水平，然后又回到该水平。在一名右利手受试者的枕中导联和右颞导联中，在高对比度和低对比度下均发现了VEP的反常增强。左颞导联在高对比度下显示VEP增强，在低对比度下显示下降。
