A surgical method in one method includes making an opening in the skin of a patient having an orthopedic condition involving a nerve pathology producing pain, positioning an instrument in the opening, the instrument having first and second substantially opposed arcuate arms, each arm having a concave inside surface so that the arms substantially define a rounded space, and a third component located substantially at a periphery of the rounded space, retaining an internal target tissue comprising a nerve on the instrument, causing an emitter to apply an emission signal upon the retained tissue, causing a detector to receive an evaluation signal from the internal target tissue, wherein the evaluation signal is a tissue response to the emission signal, causing a processor to receive the evaluation signal from the detector, receiving an indicia about the nerve from the processor, and retracting the third component in response to the indicia.