Abstract
The effect on sensation threshold of an alternating current of different intensities applied to two fingers of one hand was studied in 15 subjects during five separate sessions. In each session stimulation corresponding to either 2, 4, 6, or 8 times the individual sensation threshold was applied intermittently during three 15-min. periods spread over 90 min. Sensation thresholds were measured at the beginning of each session and twice during the intervals between successive stimulation periods. It was shown that repeated application of supra-threshold electrical stimulation produced a rise in sensation threshold and that the magnitude of the change in threshold increased with increasing stimulus intensity.
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