Ross Hauser, MD. In this article, I have put together a summary of some of the symptoms and conditions that we have seen in our patients either previously diagnosed or recently diagnosed with Craniocervical Instability, upper cervical spine instability, cervical spine instability, or simply problems related to neck pain. The condition that is the most perplexing for patients and their doctors to figure out is upper cervical instability. As described throughout the articles on this website, the most important instability in the human body to understand and resolve is upper cervical instability. Why? Because cervical instability can be a devastating, …