Implantable FES Stimulation Systems: What is Needed?

Since their initial development, the performance gains in functional electrical stimulation (FES) systems have been modest. Conceptually, the replacement of normal neural function by artificial electronic systems is attractive, considering the continued technologic advancements in electronics, communication, and control. It is likely that efficacious FES systems will require complete implantation and activation of large numbers of motor units. One approach is to develop a neural interface that has a one‐to‐one relationship between stimulating electrodes and lower motor neurons. While technology may offer solutions to the design of miniaturized implantable stimulators, the high–density neural interface remains more elusive.

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