title: A very stable electrode system for recording human scalp potentials with direct-coupled amplifiers.
mesh_terms: D000669:Amplifiers, Electronic; D004566:Electrodes; D004569:Electroencephalography / Q000295:instrumentation; D004594:Electrophysiology; D005071:Evoked Potentials; D006801:Humans; D008722:Methods; D012535:Scalp / Q000502:physiology*