Discrimination and Recognition of Phantom Finger Sensation Through Transcutaneous Electrical Nerve Stimulation

Frontiers in Neuroscience
Mengnan LiXiaohong Sui

Abstract

Tactile sensory feedback would make a significant contribution to the state-of-the-art prosthetic hands for achieving dexterous manipulation over objects. Phantom finger sensation, also called referred sensation of lost fingers, can be noninvasively evoked by transcutaneous electrical nerve stimulation (TENS) of the phantom finger territories (PFTs) near the stump for upper-limb amputees. As such, intuitive sensations pertaining to lost fingers could be non-invasively generated. However, the encoding of stimulation parameters into tactile sensations that can be intuitively interpreted by the users remains a significant challenge. Further, how discriminative such artificial tactile sensation with TENS of the PFTs is still unknown. In this study, we systematically characterized the tactile discrimination across different phantom fingers on the stump skin by TENS among six subjects. Charge-balanced and biphasic stimulating current pulses were adopted. The pulse amplitude (PA), the pulse frequency (PF) and the pulse width (PW) were modulated to evaluate the detection threshold, perceived touch intensity, and the just-noticeable difference (JND) of the phantom finger sensation. Particularly, the recognition of phantom fingers under ...Continue Reading

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Citations

Jul 7, 2020·Frontiers in Neuroscience·Alessia ScarpelliLoredana Zollo
Aug 18, 2020·Journal of Neuroscience Methods·Yimeng GeXiaohong Sui
Jun 2, 2021·Nature Biomedical Engineering·Dario FarinaOskar C Aszmann

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