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The afferent neural response to electrotactile stimuli: preliminary results
K A Kaczmarek1, M E Tyler, A J Brisben
1Department of Rehabilitation Medicine, University of Wisconsin-Madison 53706, USA. k.a.kaczmarek@ieee.org
Abstract:
We recorded action potentials from three RA fibers innervating primate fingerpad, while applying electrotactile (electrocutaneous) stimulation. Negative pulses required 1.3-1.5 times more current than positive ones for entrainment. The strength-duration time constant was approximately 151 micros. Suprathreshold sinusoidal vibration synchronized to 30-Hz electrotactile pulses changed the electrotactile entrainment current slightly, indicating a possible electrical-mechanical transduction interaction.
