The Wackenheim line is a radiological line that continues the course of the clivus. If the clivus is concave or convex, then the line is drawn from the basion to the base of the posterior clinoid process on the clivus[^1].
Clinical Relevance
The Wackenheim line can be used for assessment in a basilar invagination. The dens should be tangent or below the Wackenheim line[^1].