Pattern-Reversal visual evoked potentials (VEP) were elicited in 10 controls by optomechanical and TV-reversal. TV-stimulation was done in the frame-locked and -unlocked mode. Comparing P2-latencies evoked by different stimulation fields of the screen delays up to 30 ms and increased standard deviations could be observed in the TV-stimulation modes. Moreover, stimulating with small checks a diminution of amplitudes and a simplification of the shape was seen in contrary to the mirror method.
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