Book ChapterDOI
Spatial Summation of Electro-Tactile Displays at Subthreshold
Rahul Kumar Ray,M. Manivannan +1 more
- pp 463-470
TLDR
In this paper, the authors presented a method to use the electrotactile display at a lower threshold by applying two sub-threshold stimuli placed nearby, which is tested on fourteen subjects over a frequency range from 20 to 1280 Hz in the tuning curve.Abstract:
Electrotactile displays provide tactile feedback using electrical currents. However, prolonged usage of them causes skin irritation and burns. This study presents a novel method to use the electrotactile display at a lower threshold by applying two subthreshold electrotactile stimuli placed nearby. This method is tested on fourteen subjects over a frequency range from 20 to 1280 Hz in the tuning curve. Two Psychophysical experiments have been conducted to measure their thresholds for individual stimuli and presented together. In the first experiment, the frequencies of both the stimuli were the same, and it showed 36% to 18% reduction in EPT of the second stimulus when the first stimulus was at 10% to 50% of its threshold. In the second experiment, Meissner and Pacinian were selectively stimulated by applying stimuli at their resonant frequencies (30 and 250 Hz, respectively), results showed slightly more reduction in the case of 250 Hz compared to 30 Hz.read more
Citations
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Book ChapterDOI
Reduction of Electrotactile Perception Threshold Using Background Thermal Stimulation.
Rahul Kumar Ray,M. Manivannan +1 more
TL;DR: In this paper, a psychophysical experiment was conducted to measure EPT with and without BTS (+7 °C) over a wide range of stimulus frequencies of EPT from 20 Hz to 640 Hz.
Journal ArticleDOI
Reduction of electrotactile perception threshold using subthreshold vibrotactile stimuli
TL;DR: In this paper, a method for reducing the EPT using a background stimulation with a vibrotactile display at sub-threshold: 90% of the Vibration Perception Threshold (VPT) at 235 Hz.
Journal ArticleDOI
Effect of Subthreshold Electrotactile Stimulation On The Perception of Electrovibration
TL;DR: In this paper , the effect of tactile masking of electrovibration by electrotactile stimulus was investigated on the perception of texture in a psychophysical experiment on 13 participants.
References
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Journal ArticleDOI
Clustering of Pacinian corpuscle afferent fibres in the human median nerve.
TL;DR: The results suggested that PC afferents are partially segregated in the nerve, and were neighbouring on slowly adapting type II (SAII) units and skin sympathetic activity in individual fascicles.
Journal ArticleDOI
Spatial summation in the tactile sensory system: Probability summation and neural integration
TL;DR: It is concluded that spatial summation in the P channel is a joint function of two processes that occur as the areal extent of the stimulus increases: probability summation and neural integration in which neural activity originating from separate receptors is combined within the central nervous system rendering the channel more sensitive to the stimulus.
Proceedings ArticleDOI
Optimizing the Tactile Display of Physiological Information: Vibro-Tactile vs. Electro-Tactile Stimulation, and Forearm or Wrist Location
TL;DR: The tactile-display prototypes designed to alert the clinician of adverse changes in a patient's physiological state efficaciously and unobtrusively delivered these data and warranted further investigation and development.
Journal ArticleDOI
Coding source localization through inter-spike delay: modelling a cluster of Pacinian Corpuscles using time-division multiplexing approach.
TL;DR: This model extended the previous model of an isolated-PC to a cluster-PC focussing on relative spike delay and displacement threshold for understanding how the stimulus location is coded, and validated the relative spikedelay and the displacement threshold curves with experimental data in the literature.