The EEG machine history begins with a scientist named Luigi Galvani in 1780. Galvani found that a dead frog’s legs muscles twitched when touched by electricity.
He and his contemporaries agreed that nerves carry electrical fluid to muscles. Thus, electrical activity is essential for nerve conduction and muscle contraction.
Using this information, Alessandro Volta created the battery. In 1809, Luigi Rolando first stimulated an animal’s cortical cortex using galvanic current. He found that this highlighted the function of different parts of the brain.
Later, scientists discovered that the brain’s electrical stimulation causes contralateral motor responses. At the time, experts didn’t know if this intrinsic electrical brain current could be recorded.
On July 6, 1924, Hans Berger generated the first electrocorticogram. He made this recording during a 17-year-old boy’s neurosurgical operation. His report described the graphical recording as alpha and beta waves.
Soon after, a group of American EEG pioneers identified further information. H. and P. Davies, F. and E. Gibbs, Lenox, and Jasper described spikes and waves.
Berger had previously interpreted these variations as only artifacts. This became a significant milestone for advancing neuroscience and EEGs.