Elections. 1  Election results. 2  Be a precinct election official. 3  Election calendar.  Information for 1  candidates. Put an issue on the ballot.
A retrolisthesis is a posterior displacement of one vertebral body with respect to the adjacent vertebrae to a degree less than a luxation (dislocation) .igns and symptoms [edit]. Retrolisthesis may lead to symptoms of greatly varying intensity and distribution. This is because of the variable nature of the impact on nerve tissue and of the mechanical impact on the spinal joints themselves.
Adj. 1. retroactive-descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously. psychological science, psychology-the science of mental life.