Evoked potential in relation to subsequent alpha frequency.

A series of 24 visually evoked potentials was obtained from a normnal human subject under a set of unvarying experimental conditions. The 24 trials were ordered according to the alpha frequency subsequent to presentation of the stimulus. The evoked potentials fromt the 12 higher- and 12 lower-frequency trials were averaged separateb. These two average curves differed significantly at each of the six nodal points.