Pattern identification as a function of stimulation current on a fingertip-scanned electrotactile display.
Two studies were conducted to determine the effect of stimulation current on pattern perception on a 49-point fingertip-scanned electrotactile (electrocutaneous) display. Performance increased monotonically from near chance levels at the lowest sub-threshold current levels tested to approximately 90% at the highest comfortable current levels. This suggests the existence of a tradeoff between spatial performance and usable "gray scale" range in electrotactile presentation of graphical information.
D000328:Adult; D004558:Electric Stimulation / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D005260:Female; D005385:Fingers / Q000294:innervation / Q000502:physiology*; D006801:Humans; D008297:Male; D010363:Pattern Recognition, Automated; D015203:Reproducibility of Results; D012677:Sensation / Q000502:physiology; D012680:Sensitivity and Specificity; D012682:Sensory Aids; D012684:Sensory Thresholds / Q000502:physiology*; D012867:Skin / Q000294:innervation; D012879:Skin Physiological Phenomena; D013647:Task Performance and Analysis; D014159:Transducers