Methods for non-pedicle spinal fixation. In some implementations, at least one plate member may be placed between an upper spinous process and a lower spinous process of a spine. At least one scissoring element coupled to the at least one plate member may then be positioned to contact opposing lateral surfaces of the upper spinous process and to contact opposing lateral surfaces of the lower spinous process. The at least one scissoring element may then be locked into place to stabilize the spinous processes.