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The most common mechanism of injury is high-speed motor vehicle accidents. The injury is more likely in children due to the large size of their heads relative to their bodies, and more horizontal orientation of the occipital condyles. It represents <1% of all cervical spine injuries. [1] Several subtypes of atlanto-occipital dislocation are known.
Atlantoaxial instability is a common asymptomatic finding in rheumatoid arthritis patients. [3] However, it can lead to cervical myelopathy . [ 4 ] Patients with atlantoaxial instability can experience neck pain and headaches in the back of the head (occipital headaches).
The median atlanto-axial joint is sometimes considered a triple joint: [3] one between the posterior surface of the anterior arch of atlas and the front of the odontoid process; one between the anterior surface of the ligament and the back of the odontoid process; The lateral atlantoaxial joint involves the lateral mass of atlas and axis. [4]
Surgery may be used to fix the joint and any associated bone fractures. [1] Neck movement may be reduced long after this injury. [1] Such injuries may also lead to hypermobility, which may be diagnosed with radiographs. [2] This is especially true if traction is used during treatment. [2]
Craniocervical instability is more common in people with a connective tissue disease, including Ehlers-Danlos syndromes, [1] osteogenesis imperfecta, and rheumatoid arthritis. [2] It is frequently co-morbid with atlanto-axial joint instability, Chiari malformation , [ 3 ] or tethered spinal cord syndrome .
At either lateral extremity, [3]: 426, 430 the membrane is pierced by the vertebral artery [3]: 426, 430, 452 and cervical spinal nerve C1. [3]: 426 The free border of the membrane arches over the artery and nerve, [5] and is sometimes ossified (converting the passage for the vertebral artery into a foramen).
The elderly Because of such symptoms, people often mistake cervical spine disorder indicators for coronary artery disease, and although individuals of any age can develop spine threatening injuries, the people that are affected by it the most are the elderly. This is because as one ages spinal discs that absorb any type of shock wear out ...
The tectorial membrane of atlanto-axial joint (occipitoaxial ligaments) is a tough membrane/ [1] broad, strong band [2] representing the superior-ward prolongation of the posterior longitudinal ligament (the two being continuous). [3] [1] [2] It attaches inferiorly onto (the posterior aspect of [2]) the body of axis. [3] It broadens superiorly.