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(a.) The CWRU spiral nerve-cuff electrode. The electrode is designed to wrap twice around the nerve so that four contacts are equally spaced around the circumference. (b.) The unspiraled cuff with labels for contacts 1, 2, 3, and 4. (c.) A spiral nerve-cuff around the femoral nerve. The cuff is placed distal to nerve branches that innervate rectus femoris and sartorius, but proximal to branches that innervate the vasti.
