What are the symptoms of atlantoaxial instability?
Neurologic manifestations include clumsiness, lack of coordination, abnormal gait, difficulty walking, easy fatigability, neck pain, limited next mobility, torticollis, sensory deficits, neurogenic bladder, upper motor neuron signs (spasticity, hyperreflexia, clonus, Babinski sign), paraplegia, hemiplegia, and …
What is atlantoaxial instability?
Atlanto-axial instability (AAI) is a condition that affects the bones in the upper spine or neck under the base of the skull. The joint between the upper spine and base of the skull is called the atlanto-axial joint. In people with Down syndrome, the ligaments (connections between muscles) are “lax” or floppy.
What movement does the atlantoaxial joint allow?
The primary movement of the atlantoaxial joint complex is rotation. In rotation the atlas together with the head, rotate around the dens of axis. This movement allows us to turn our head to look towards the left or towards the right.
What happens atlantoaxial subluxation?
Atlantoaxial instability (AAI), also known as atlantoaxial subluxation, is radiologically identified increased mobility or laxity between the body of the first cervical vertebra (atlas) and the odontoid process of the second cervical vertebra (axis) (see the image below).
What type of joint is Atlantoaxial?
It is classified as a pivot joint. The lateral atlantoaxial joints are bilateral joints formed between the lateral masses of the atlas and axis. These joints are classified as gliding, or plane joints….Atlantoaxial joint.
| Type | Atlantoaxial joint complex: Synovial joint; biaxial |
|---|---|
| Blood supply | Deep cervical, occipital, vertebral arteries |
What kind of joint is Atlantoaxial?
pivot joint
The median atlantoaxial joint is formed between the dens of axis and an osteoligamentous ring of the atlas anteriorly and transverse ligament posteriorly. It is classified as a pivot joint….Atlantoaxial joint.
| Type | Atlantoaxial joint complex: Synovial joint; biaxial |
|---|---|
| Blood supply | Deep cervical, occipital, vertebral arteries |
How many Atlantoaxial joints are there?
three atlanto
There are three atlanto-axial joints: one median and two lateral: The median atlanto-axial joint is sometimes considered a triple joint: one between the posterior surface of the anterior arch of atlas and the front of the odontoid process.
How common is atlantoaxial subluxation?
Spontaneous atlantoaxial subluxation is a well-recognized complication affecting about 2% of patients with AS, presenting with and without signs of spinal cord compression.