Evoked potential recovery from tape recorded zero crossings of the EEG.
D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography / Q000295:instrumentation*; D004594:Electrophysiology / Q000295:instrumentation*; D005071:Evoked Potentials; D006801:Humans; D008027:Light; D013637:Tape Recording / Q000295:instrumentation*