Atlantoaxial instability (AAI) is a significant neurosurgical condition most frequently identified in toy breed dogs, stemming from congenital malformations or trauma-induced ligamentous ...

Atlantoaxial instability (AAI) is defined as excessive movement at the junction between the spine's first two vertebrae. It is unclear how common it is. Neurological symptoms, such as ...

Rachel Pighills has atlantoaxial instability, which is defined by excessive movement between the first and second vertebrae of her neck. This causes the 33-year-old's spine to partially dislocate ...