Ponticulus Posticus (Posterior Ponticle of the Atlas, Arcuate Foramen)
bony bridge in the first cervical vertebra between the lateral mass and the posterior arch
Forms an arcuate foramen
Posterior Arch Non-Union
A common anomaly of no clinical significance
Lack of a Spinolaminar Jct. Line on the lateral view (at any level from C1- C7)
May be difficult to see on the APOM, but look for a smoothly marginated sagittal midline
defect
Down syndrome
Agenesis of the Transverse Ligament is found in 20% of Down Syndrome patients
Causes instability (ADI above normal )
Ossiculum Terminale Persistens of Bergman
anomaly of the odontoid process in which an ossification center that gives rise to the tip of
the dens fails to fuse properly with the body of the axis
Os Odontoideum
- rare anomaly of the second cervical vertebrae
- characterised by a separation of a portion of the odontoid process (also called the dens)
from the body of the axis
- the little bone is marked by a small oval corticated ossicle of which the size can range
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Hkane. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
