Abstract: An apparatus is described for performing surgical procedures through a patient's skull to a target within the skull by utilizing a computer-assisted tomography scanner comprising a base platform which is positioned on the table of the scanner. A pair of vertically disposed support members are selectively longitudinally movably mounted at opposite sides of the platform and have arc carrier supports selectively vertically movably mounted thereon. An arc carrier is selectively pivotally mounted to the arc carrier supports and has an arcuate segment movably mounted thereon. A probe holder is selectively movably mounted on the arc.

Abstract: A computed tomography stereostactic frame is disclosed designed for use with a CT Scanner. The frame comprises a platform or support including an area thereon for supporting a patient's head and for maintaining the patient's head in position. An inverted substantially U-shaped frame is selectively movably mounted on the support. A probe holder is selectively movably mounted on either of the leg portions or the base portion of the frame and is designed to permit a twist drill bit or probe to be extended therethrough.

Abstract: An artificial intervertebral disc for implantation in the disc space after the removal of a diseased or damaged cervical intervertebral is described and comprises upper and lower disc portions having a plurality of springs positioned therebetween to yieldably urge the disc portions away from each other. A plurality of spikes extend upwardly from the upper disc portion for engagement with the vertebra thereabove. A plurality of spikes extend downwardly from the lower end of the lower disc portion for engagement with the vertebra therebelow.