Abstract
Flicker-induced modifications of the human photopic oscillatory potentials (OPs) were investigated with the use of flash stimuli of 0.89 and 8.9 cd m −2 sec in strength. When the dimmest stimulus is used, increasing the rate of presentation from 0.5 to 20 Hz augments the amplitude and peak time of OP 2. For a brighter stimulus, the 10 Hz flicker significantly reduces the amplitude of OP 2 and OP 3, increases the peak time of OP 2 and reduces that of OP 4. The 20 Hz flicker increases the peak time and reduces the amplitude of OP 2 and completely abolishes OP 3, while it has no significant impact on the amplitude and timing of OP 4. The data presented support the claim that each OP making the photopic response represent independent electrophysiological entities.
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