<R001> Monopolar needle, isometric contraction.
<R002> Needle and fine-wire, isometric contraction.
<R003> Concentric needle, isometric contraction.
<R004> Quadrifilar needle, ramp contraction.
<R005> Monopolar needle, isometric contraction.
<R006> Monopolar needle, ramp contraction.
<R007> Fine-wire, isometric contraction.
<R008> Multi-channel fine wire, isometric contraction.
<R009> Quadrifilar needle, trapezoidal contraction.
<R010> Cut-end fine wire, very long isometric contraction.
<R011> High-spatial-resolution surface electrodes, isometric contraction.
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