Targeted transcutaneous electrical nerve stimulation for phantom limb sensory feedback
2017 IEEE Biomedical Circuits and Systems Conference (BioCAS)
In this work, we investigated the use of noninvasive, targeted transcutaneous electrical nerve stimulation (TENS) of peripheral nerves to provide sensory feedback to two amputees, one with targeted sensory reinnervation (TSR) and one without TSR. A major step in developing a closed-loop prosthesis is providing the sense of touch back to the amputee user. We investigated the effect of targeted nerve stimulation amplitude, pulse width, and frequency on stimulation perception. We discovered that both subjects were able to reliably detect stimulation patterns with pulses less than 1 ms. We utilized the psychophysical results to produce a subject specific stimulation pattern using a leaky integrate and fire (LIF) neuron model from force sensors on a prosthetic hand during a grasping task. For the first time, we show that TENS is able to provide graded sensory feedback at multiple sites in both TSR and non-TSR amputees while using behavioral results to tune a neuromorphic stimulation pattern driven by a force sensor output from a prosthetic hand.
@inproceedingsOsborn_2017 doi: 10.1109/biocas.2017.8325200 url: https://doi.org/10.1109/biocas.2017.8325200 year: 2017 month: oct publisher: IEEE author: Osborn Luke and Fifer Matthew and Moran Courtney and Betthauser Joseph and Armiger Robert and Kaliki Rahul and Thakor Nitish title: Targeted transcutaneous electrical nerve stimulation for phantom limb sensory feedback booktitle: 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS)