The purpose of this work was to discover the spatial and temporal characteristics of skin sensations elicited by electrocutaneous stimulation through an array of coaxial electrodes. As a fundamental index of spatial properties of skin sensations, two point threshold and point localization were measured. Electrocutaneous stimulation including the interaction among the electrodes makes spatial resolution of the skin, in general, worse than mechanical stimulation. However, it is found that successive electrocutaneous stimuli, especially in the case of ISI=0. improve the two point threshold significantly. Electrocutaneous stimulation modulated temporally and spatially is feasible to transmit more information through skin sensations.
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