Publication Type:Journal Article
Source:J Neural Eng (2017)
The objective of this work was to evaluate whether nerve cuffs can selectively activate hand muscles for functional electrical stimulation (FES). FES typically involves identifying and implanting electrodes in many individual muscles, but nerve cuffs only require implantation at a single site around the nerve. This method is surgically more attractive. Nerve cuffs may also more effectively stimulate intrinsic hand muscles, which are typically difficult to individually implant and stimulate without spillover to adjacent muscles.To evaluate its ability to selectively activate muscles, we implanted and tested the Flat Interface Nerve Electrode (FINE), which is designed to selectively stimulate peripheral nerves that innervate multiple muscles . We implanted FINEs and bipolar intramuscular wires for recording compound muscle action potentials (CMAPs) from up to 20 muscles in each arm of six monkeys. We then collected recruitment curves while the animals were anesthetized.A single FINE implanted on an upper extremity nerve in the monkey can selectively activate muscles or small groups of muscles to produce multiple, independent hand functions.FINE cuffs can serve as a viable supplement to intramuscular electrodes in FES systems, where they can better activate intrinsic and extrinsic muscles with less extensive surgery.