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Virtual Pediatric Hospital: Paediapaedia: Cervical Pseudosubluxation Paediapaedia: Neurological Diseases

Cervical Pseudosubluxation

Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed

Clinical Presentation:
Not applicable

In children up to 10 years old the maximum movement in the cervical spine with flexion and extension is at the C2-C3 level. There can be up to 5 mm of movement between C2 and C3 due to the ligamentous laxity at this level.

Not applicable

Imaging Findings:
Use posterior cervical line which is drawn between the posterior arches of C1 to C3. With physiologic subluxation this line passes through or less than 1 mm anterior to the posterior cortex of C2. With a fracture of the arch of C2 this distance will be increased since C1 and the vertebral body of C2 will slip forward at the fracture site.


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