Scientists Invent Machine To Discover How Brain Works (Apr, 1935)
Scientists Invent Machine To Discover How Brain Works
THE brain, perhaps the most mystifying organ of the human body, can now be scientifically studied by a new apparatus which photographs amplified “action currents.” Invented by Dr. H. H. Jasper and Dr. L. Carmichael of Brown University, the new machine will permit physicians to study the action of the brain just as the electrocardiograph permits a revealing study of heart action.
A headpiece on the head of the patient picks up electric currents of about one ten-millionths of a volt which flow from the brain in waves, at a rate of from eight to fifty per second. The currents are carried to an amplifying box where they are intensified 500,000 times and flashed across a glass disc. The ordinary currents are smooth and wavy; when the mind is disturbed, they are sharp and irregular.