Spatial Summation of Localized Pressure for Haptic Sensory Prostheses
CoRR(2024)
摘要
A host of medical conditions, including amputations, diabetes, stroke, and
genetic disease, result in loss of touch sensation. Because most types of
sensory loss have no pharmacological treatment or rehabilitative therapy, we
propose a haptic sensory prosthesis that provides substitutive feedback. The
wrist and forearm are compelling locations for feedback due to available skin
area and not occluding the hands, but have reduced mechanoreceptor density
compared to the fingertips. Focusing on localized pressure as the feedback
modality, we hypothesize that we can improve on prior devices by invoking a
wider range of stimulus intensity using multiple points of pressure to evoke
spatial summation, which is the cumulative perceptual experience from multiple
points of stimuli. We conducted a preliminary perceptual test to investigate
this idea and found that just noticeable difference is reduced with two points
of pressure compared to one, motivating future work using spatial summation in
sensory prostheses.
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