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Case Studies in Neuroscience: Sensations elicited and discrimination abilityfrom nerve cuff stimulation in an amputee over time

By Kirstin Ahmed

This case study demonstrates the feasibility for long-term sensory feedback using implanted nerve cuff electrodes, and shows that sensations elicited in the missing hand were relatively stable over the course of two years. Sensations were elicited by electrical stimulation using an implanted nerve cuff electrode for a participant with a neuromusculoskeletal prosthesis, who at best was able to distinguish between sensations delivered with only 1/2 Hz difference between them. The ability to distinguish these different sensations is paramount to usable and graded sensory feedback. With this technology, we can develop sensory feedback systems which can signal information about prosthesis movement and its interaction with the world in daily life.