DescriptionAttempt to use human brain to receive radio waves.jpg
English: Experiment by US radio engineer Archie Frederick Collins in 1902 to try to use a human brain as a radio wavedetector. At this early point in radio history, the poor performance of the existing device used in receivers to detect radio waves, the coherer, motivated much scientific research to find new radio wave detectors. Collins reasoned that since the brain was known to work electrically, it might be sensitive to radio waves. He used a fresh brain from a cadaver in a salt solution, and attached electrodes to the brain tissue. He ran a low DC current from the batteries shown through the tissue. Then he exposed it to radio wave pulses in the UHF band from a Hertzian spark transmitter, and listened for audio signals with earphones in the circuit. If the nervous tissue changed conductivity when the pulses of radio waves hit it, the way a coherer did, it should cause variations in current that should be audible as clicks in the earphone. He claimed that the brain did have a 'cohering' effect, but efforts to repeat his experiment failed to confirm the effect.
Alterations to image: removed aliasing artifacts (crosshatched lines) caused by scanning of halftone photo, using Fourier transform filter in Gimp image editor.
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Experiment in 1902 by A. F. Collins to determine if a human brain can receive radio waves
Esperimento condotto nel 1902 da A. F. Collins, finalizzato a determinare se un cervello umano estratto da un cadavere fosse in grado di reagire alle l'emissione di onde radio.