An early peak of the pattern reversal evoked potential (PREP).
An early peak of the pattern reversal evoked potential with an implicit time between 30 and 50 msec, and an amplitude of 0.5-1 muv was demonstrated. The peak varies with the spatial frequency of the stimulus (checksize), and, the viewing condition (binocular vs monocular). Further study is being done to determine the origin.
D005074:Evoked Potentials, Visual; D005556:Form Perception; D006801:Humans; D010364:Pattern Recognition, Visual