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A wide spectrum of congenital and acquired lesions can result in atlantoaxial instability (AAI).5,6 In individuals with Down syndrome (DS), the excessive laxity of the posterior transverse ligament, which attaches the odontoid bone to C1, is the most common cause of AAI7 , but this has not been proven and not...
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emedicine.medscape.com/article/1180354-overview
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Atlantoaxial instability (at-lan-toe-ax-ee-ul instability), often referred to as AAI, is a condition affecting the two bones at the top of the spinal cord. About 15% of people with Down syndrome will have AAI diagnosed on an x-ray.
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downsyndrome.about.com/b/2009/01/06/term-of-the-week-at...
downsyndrome.about.com/b/2009/01/06/term-of-the-week-atlantoaxial-instability.htm
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Atlantoaxial instability or AAI is a common orthopedic problem in Down syndrome. To learn more about this problem, including its symptoms and treatments, read here. ... Cause, Diagnosis and Treatments of Atlantoaxial Instability in Down Syndrome...
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downsyndrome.about.com/od/medicalissuesinds/a/AAI_ro.ht...
downsyndrome.about.com/od/medicalissuesinds/a/AAI_ro.htm
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Even then, if instability is shown, we do not know if it is these people who are most at risk of sustaining a sudden dislocation-type injury at some time in the future. In fact we have evidence of the reverse, namely of people with no x-ray evidence of instability who subsequently sustain a neck dislocation.
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www.dsmig.org.uk/library/articles/dsa-medical-series-3....
www.dsmig.org.uk/library/articles/dsa-medical-series-3.pdf
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Statement regarding atlantoaxial instability in children with Down Syndrome. ... The American Academy of Pediatrics' Committee on Sports Medicine released a revised statement in July 1995 regarding Atlantoaxial Instability (AAI) in children with DS. This was published in the journal Pediatrics, 96(1):151-154. Here's the...
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www.ds-health.com/aai.htm
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Author's note: I'm a pediatrician and the father of Avi, 15 years old, and Nathan, 17 years old. (Photos!) I have put them here for general reading. ... The information provided at this Web site is considered general medical information for educational purposes and is not a substitute for the advice of your physician.
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- Grisel's syndrome: - atlantoaxial instability may be noted in nl child in association w/ pharyngeal infection (Grisel's syndrome);
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www.wheelessonline.com/ortho/atlantoaxial_subluxation_
www.wheelessonline.com/ortho/atlantoaxial_subluxation_
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In this clinical review, the authors evaluate and summarize the management of 23 pediatric cases of atlantoaxial instability treated between March 1990 and October 2002. Four broad categories of atlantoaxial problems were observed— atlantoaxial rotatory subluxation in six patients,
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www.medscape.com/viewarticle/467000
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2). Cervical spine x-ray films, with flexion and extension views demonstrating movement at the preodontoid space, were most helpful in diagnosing anteroposterior atlantoaxial instability. Additionally, MR imaging studies performed in traumatic cases was helpful in identifying ligamentous injury.
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www.medscape.com/viewarticle/467000_3
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