The electrode, the brain and the mind.
D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D004558:Electric Stimulation; D004566:Electrodes; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans; D009046:Motor Neurons; D009482:Neurophysiology / Q000266:history*; D011603:Psychophysiology / Q000266:history