... of pressure over multi-ple spinal levels and the combina-tion of compression with systemichypotension can lower these thresh-old injury levels.The pedicle is a constant anatomiclandmark ... Bohlman HH, DodgeLD, Biro C: Experimental lumbarspinal stenosis: Analysis of the corticalevoked potentials, microvasculature,and histopathology. J Bone Joint SurgAm 1990;72:110-120.3. Olmarker ... GarfinSR, Bell GR, Balderston RA, Wiesel SW(eds): Rothman-Simeone: The Spine, 4thed. Philadelphia: WB Saunders, 1999,vol 2, pp 1724-1733.6. Stevens WR, Glazer PA, Kelley SD,Lietman TM, Bradford DS:...