It seems astonishing that the story of electroencephalography, EEG, began back in Victorian times. The first research was published in 1875 by Liverpool physician Richard Caton. Fifty years later, the first recording of human brain activity was achieved by Hans Berger, and the EEG headset was born. The headset detects brain activity via electrodes, information which is then converted into a visual form. Throughout the twentieth century, electroencephalography was used almost exclusively for medical research, proving itself a handy tool on the diagnosis of epilepsy. Rapidly developing software that enables increasingly sophisticated analysis of the data has triggered research projects looking at the brain’s reaction to a range of external stimuli.