Richard Caton

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Richard Caton (1842-1926) of Liverpool, England was a scientist who was crucial in discovering the electrical nature of the brain and laid the groundwork for Hans Berger to discover Alpha wave activity in the human brain.

In July 1875 Caton reported to the British Medical Association in Edinburgh (Caton 1875) that he had used a galvanometer to observe electrical impulses from the surfaces of living brains in animal subjects.(Smith 1970)(Finger 1994) After Caton died, Hans Berger was one of few to recognize his importance and cited him in his 1929 report on the discovery of Alpha waves. He wrote:

Caton has already published experiments on the brains of dogs and apes in which bare unipolar electrodes were placed either on the cereral cortex and the other on the surface of the skull. The currents were measured by a sensitive galvanometer. There were found distinct variations in current, which increased during sleep and with the onset of death strengthened, and after death became weaker and then completely disappeared. — Translated by Cohen, 1959. (Berger 1929)(Finger 1994)

[edit] References

Berger, Hans (1929), "Über das Elektroenkephalogramm des Menschen", Arch. Psychiatr. 87: 527-570
Finger, Stanley (1994), written at New York, Origins of Neuroscience: a history of explorations in brain function, Oxford University Press, 41-42
Caton, Richard (1875), British Medical Journal
Smith, C.U.M. (1970), written at New York, The Brain: Towards an understanding, G. P. Putnam's Sons