Research Article

Control of Pedicle Screw Placement with an Electrical Conductivity Measurement Device: Initial Evaluation in the Thoracic and Lumbar Spine

Figure 1

Illustration of the proximity of nerve root and dural sac to the pedicle. Misplacement of pedicle screws can cause damage to the dural sac or the exiting nerve roots if the pedicle wall is broken mediocaudally (dangerous zone). Modified figure published in PediGuard booklet (SpineVision, Paris, France).