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Electrocutaneous stimulation L The effects of stimulus parameters on absolute threshold |
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| Authors: | John P. Girvin Lawrence E. Marks John L. Antunes Donald O. Quest Michael D. O’Keefe Peter Ning Wm. H. Dobelle |
| Affiliation: | 1. The University of Western Ontario, London, Ontario, Canada 2. John B. Pierce Foundation Laboratory, 290 Congress Avenue, 06519, New Haven, Connecticut 3. Yale University, New Haven, Connecticut 4. Division of Artificial Organs, College of Physicians and Surgeons of Columbia University, New York, New York |
| Abstract: | Thresholds for detecting electrical stimulation were measured as a function of (1) body locus, (2) electrode configuration, (3) stimulus waveform, and (4) pulse duration. The results were: (1) the forehead gave slightly, but not reliably, lower thresholds than the abdomen; (2) concentric electrodes gave slightly, but not reliably, lower thresholds than unifocal electrodes; (3) cathodal monophasic (?) pulses and biphasic pulses (+/? and ?/+) gave identical thresholds, while anodal monophasic (+) pulses gave higher thresholds; and (4) thresholds decreased as pulse duration increased up to .5 msec, but changed less with longer pulses. |
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