What causes atlanto occipital assimilation?
Atlantooccipital assimilation is a partial or complete congenital fusion between the atlas and the base of the occiput [2]. This occurs due to the failure of segmentation between the fourth occipital sclerotome and the first spinal sclerotome [3].
What is an Odontoidectomy?
Introduction. Transoral odontoidectomy is the treatment of choice in cases of anterior bulbo-medullary compression. The development of endoscopic procedures has made it possible to perform odontoidectomy via a minimally invasive endoscopic endonasal approach.
What is atlanto-occipital?
The atlanto-occipital articulation (also known as the C0-C1 joint/articulation) is comprised of a pair of condyloid synovial joints that connect the occipital bone (C0) to the first cervical vertebra (atlas/C1).
What is transoral Odontoidectomy?
Transoral odontoid resection is a direct technique for ventral decompression of the spinal cord in cases of non-reducible subluxation following odontoid fractures, odontoid pathologies such as odontoid neoplasms and infections.
What is Odontoid Peg?
The odontoid process (also dens or odontoid peg) is a protuberance (process or projection) of the Axis (second cervical vertebra). It exhibits a slight constriction or neck, where it joins the main body of the vertebra.
How is KFS diagnosed?
Diagnosis. Klippel Feil syndrome (KFS) is typically diagnosed based on a clinical examination, symptoms and imaging studies ( X-rays , MRI or CT scan ). Additional studies may be necessary to look at other parts of the skeleton and other body systems.
How do you increase atlanto-occipital joint?
The principal movement at the atlantooccipital joint is flexion-extension. This movement permits nodding of the head, as seen when indicating approval (the “yes” movement)….Atlantooccipital joint.
| Type | Synovial ellipsoid joint; biaxial |
|---|---|
| Movements | Principal movement; Flexion – extension Limited lateral flexion |
How does atlanto-occipital dislocation happen?
When severe flexion or extension exists at the upper cervical level, atlanto-occipital dislocation may occur. Atlanto-occipital dislocation involves complete disruption of all ligamentous relationships between the occiput and the atlas.
Where is odontoid process found?
The odontoid process, or dens, is a superior projecting bony element from the second cervical vertebrae (C2, or the axis). The first cervical vertebrae (atlas) rotates around the odontoid process to provide the largest single component of lateral rotation of the cervical spine.