Alpha blocking during visual after-images.
D000328:Adult; D000360:Afterimage; D001288:Attention; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D004594:Electrophysiology; D006801:Humans; D008027:Light; D008297:Male; D009622:Noise; D009778:Occipital Lobe / Q000502:physiology