Ross Hauser, MD. Atlantoaxial instability and Atlas displacement are a primary focus of the Hauser Neck Center at Caring Medical Florida. In this article, we will discuss possible bizarre and disabling neurological symptoms that have gone undiagnosed or unresolved and the impact of Atlantoaxial instability and Atlas displacement, and upper cervical instability on the brainstem, nerve, and blood vessel compression including the carotid artery, and the jugular veins. Atlantoaxial instability is the abnormal, excessive movement of the joint between the atlas (C1) and axis (C2). This junction is unique in the cervical spine as the C1 and C2 are not …