[The relationship between oscillatory potentials of the electroretinogpam and components of the visual cortex evoked response]

Abstract

In the electroretingram of rabbit, the oscillatory potentials (OPs) were shown to appear in response to a wide range of the light stimuli intensities (0.023--120 joules). The minimum time required for the OP onset was 10 msec. The OP duration was independent of the stimulus intensity and ranged between 6--7 msec. The number of OPs, their amplitudes, latency, and peak latency varied along with the intensity of the stimuli. OP1 occurred during developing of "a" wave, while OP2, OP3, OP4--at the ascending phase of "b" wave of the electroretinogram. The latency and the peak latency of the OP1 were always shorter than the respective parameters of the first component of evoked potential in the visual cortex. A definite time correlation between the formation of OP1 and OP2 and the first two components of the evoked potential was revealed. Interrelationship between OP3, OP4, and later components of evoked potentials in the visual cortex was much more complicated.