Epimysial & Intramuscular Stimulating Electrodes
Both electrode types have multi-stranded 316 stainless steel conductors helically-wound in tandem from the electrode to the connector. The helically-wound cable is covered with a silicone tube (“closed helix”). For the epimysial electrode, the silicone-encased cable terminates onto a 4mm diameter platinum-iridium disc molded into a medical-grade dacron-reinforced silicone substrate that is sewn onto the surface of a muscle. The intramuscular electrode has a 316 stainless steel stimulating area wound around the distal end of the lead, with a polypropylene anchor that secures the electrode in the muscle.
Spiral and C-FINE Nerve Cuff Electrodes
The self-spiraling nerve cuff electrode is designed to conform to the natural circumference of a nerve. The spiral nerve cuff electrode can have single or multiple platinum-foil contacts (2- 4+) that can be wired to stimulate or record in a monopolar or multipolar configuration. The composite flat interface nerve electrode (C-FINE) is a variable-stiffness cuff electrode that gently shapes the nerve to allow multiple platinum-foil contacts (4-16+) to have closer contact to the fascicles within a nerve.
Epimysial and Intramuscular MES Recording Electrodes
The epimysial bipolar MES electrodes are surgically attached to the epimysium of the target muscle. They are made of two 4mm diameter platinum-iridium discs molded into a medical grade dacron-reinforced silicone substrate. The discs are positioned 10mm apart. The intramuscular bipolar MES electrodes have two 316 stainless steel stimulating areas wound around the distal end of the lead, separated 10mm apart, with a polypropylene anchor that secures the electrode in the muscle. The cables for both types of bipolar MES electrodes are identical to the epimysial and intramuscular electrodes in that they form a single cable to the electrode, then bifurcate at a Y-junction that separates the two bipolar channels on the connector end.
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