Does spatial-frequency spectrum of singular TV frames affect VEPs?
” Perception 28 ECVP Abstract Supplement Does spatial-frequency spectrum of singular TV frames affect VEPs? S Pronin, A Harauzov, Y Shelepin, S Muravyova The aim of this work was to investigate responses of the human visual system to sets of singular TV frames consisting of images with different spatial-frequency (SF) properties. We measured human VEPs to the sequence of sine-wave gratings with the spatial frequencies of 0.4, 0.8, 1.6, 3.2, 6.4, 12.8 cycles deg-1. Gratings were presented in an ON – OFF mode. The frames were organised in sets. We used not less than three frames for one grating. The sets were organised in sequences. The first sequence started with the lowest SF, then, in increasing order, to the highest SF. The second sequence was reversed. The third sequence was random. The SF characteristics were obtained by first and second harmonics of VEP amplitude to each set in the sequence. Not only SF but also the order of presentation was crucial to VEP amplitude in the first e
