aug 4, 1875 - First to record electrical activity from the brain
Description:
Richard Caton was a physician in the Liverpool Royal Infirmary School of Medicine. He was the first man to record electrical activities from the brain in 1875. He could achieve it by probing directly on the surface of exposed brains of animals. Caton’s work was inspired by the communication of David Ferrier to the Royal Society in 1874 on the “Localization of Function in the Brain”, which reported some effects of electrical stimulation of a specific part of the brain. In 1887, He reported negative variations in the electrical activity of the brain when the lights to an animal’s eyes were interrupted. He also discovered that electrical activity occurred in the opposite side of the brain from the eye. Caton’s work was not very well known even among scientists because he published his work in a medical journal, so similar experiments were repeated a few times later. Dr. Hans Berger later recorded electrical activities from the human brain for the first time.
Electroencephalography is a method to record brain activity, and it is often abbreviated as EEG. It detects the electrical current fluctuations that occur by brain activities. EGG played an important role in analyzing brain activity. It was used to diagnose the brain before MRI or CT was invented. But it is still used in various fields, including medical diagnosis and researches, because it has some advantages like low cost, portability, and silence compared to other machines.
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Brain machine interface
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