Development Year: 1924
Inventor: Hans Berger
Description: An EEG can find changes in brain activity that might be useful in diagnosing brain disorders, especially epilepsy or another seizure disorder. An EEG might also be helpful for diagnosing or treating: Brain tumors, Brain damage from head injury, Brain dysfunction, Sleep disorders, etc…
Functionality: An EEG is a test that detects abnormalities in your brain waves, or in the electrical activity of your brain. During the procedure, electrodes consisting of small metal discs with thin wires are pasted onto your scalp. The electrodes detect tiny electrical charges that result from the activity of your brain cells. The charges are amplified and appear as a graph on a computer screen, or as a recording that may be printed out on paper. Your healthcare provider then interprets the reading.
Source: https://www.mayoclinic.org/tests-procedures/eeg/about/pac-20393875