Atlantoaxial instability (AAI)
see Atlanto-axial subluxation.
Central Atlantoaxial Instability: A New Clinical Entity? 1).
1)
Smith JS. Central Atlantoaxial Instability: A New Clinical Entity? Neurospine.
2019 Jun;16(2):212-213. doi: 10.14245/ns.19edi.005. Epub 2019 Jun 30. PubMed
PMID: 31261456.