I've found this a great site for vestibular issues and dizziness.

This is the page for cervicogenic dizziness, but there are so many different forms and reasons for vertigo and dizziness that you may want to check it out as well as some of the others listed.
http://vestibular.org/cervicogenic-dizziness


This page defines the differences between
PDF -Dizziness, Vertigo and Disequilibrium