title: Two-point discrimination threshold as a function of frequency and polarity at fingertip by electrical stimulation.
abstract: The effect of frequencies and current polarity of electrical stimulation to fingertip was investigated toward realizing electrocutaneous display. We measured the two-point discrimination threshold of electrical stimulation with 1.0 mm diameter electrodes spaced by 2.0 mm. The waveform pattern with the smallest two-point discrimination threshold was anode at frequencies from 200 to 400 Hz; most subjects could clearly discriminate the physical separation of 4 mm, some of them could discriminate 2 mm with optimized electrical stimulation.
authors.affiliation: Biological Signal Processing Laboratory, Multimidia Laboratories, NTT DoCoMo, Inc., Japan. khayashi@mml.yrp.nttdocomo.co.jp
authors.forename: Kouki
authors.initials: K
authors.lastname: Hayashi
authors.forename: Takashi
authors.initials: T
authors.lastname: Ninjouji