Patent ID: 8075601

Claim:
A method comprising: providing a bone anchor; engaging the bone anchor to a location on a vertebral body when the vertebral body is in a first orientation; coupling the bone anchor with a correction tool; manipulating the correction tool to move the vertebral body toward a second orientation with the bone anchor, wherein manipulating of the correction tool comprises applying a rotational force to the correction tool which rotates the correction tool and correspondingly rotates the vertebral body toward the second orientation; electrically monitoring the bone anchor with a nerve monitoring system to detect interference between a neural element and the bone anchor while the vertebral body is moved toward the second orientation; wherein the nerve monitoring system is operable to provide an electrical signal to the bone anchor and detect interference between the neural element and the bone anchor by measuring neural element threshold as a function of the electrical signal; and wherein the correction tool is engaged to the bone anchor and the electrical signal travels through the correction tool to the bone anchor.