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

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 ...

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 ...

The 33-year-old has a rare condition called atlantoaxial instability, which causes excessive movement between the first and second vertebrae of the neck, which hold the skull in place. This means ...

The freak accident left the woman with atlantoaxial instability and basilar invagination — a life-threatening condition in which her skull and brain have slipped into her spine, causing a bone ...

atlantoaxial instability, thyroid disease and celiac disease. Among other things, the recommendations urge all people with Down syndrome to receive Alzheimer’s screening beginning at age 40 and ...