Spine-mounted stereotactic systems and related methods

An stereotactic system for positioning a device relative to a spine extending craniocaudally in a horizontally extending longitudinal direction, wherein the system comprises:

• (a) a first frame comprising a lower part and an upper part, and at least one first pedicle screw attached to the first frame for fixedly attaching the lower part of the first frame to the spine;
• (b) a second frame comprising a lower part and an upper part, and at least one second pedicle screw attached to the second frame for fixedly attaching the lower part of the second frame to the spine, wherein the lower part of the second frame is horizontally spaced apart from the lower part of the first frame;
• and
• (c) a platform for mounting the device, wherein;
• (i) the platform is attached to the upper part of the first frame and the upper part of the second frame so as to be supported by the frames above the spine when the frames are fixedly attached by the pedicle screws to the spine;
• (ii) the platform is slidably attached to the upper part of the first frame and the upper part of the second frame to allow for selective adjustment of a longitudinal position of the platform relative to the frame;
• and
• (iii) the platform is pivotally attached to the upper part of the first frame and to the upper part of the second frame, to allow for selective adjustment of a horizontal distance between the lower part of the first frame and the lower part of the second frame, while maintaining a constant orientation of the platform.