What is kimmerle anomaly?
Kimmerle anomaly is the bony ridge between the lateral mass of atlas and its posterior arch or transverse process.
What causes Ponticulus Posticus?
The ponticulus posticus is a bony bridge in the first cervical vertebra between the lateral mass and the posterior arch. It results due to ossification of the posterior atlanto-occipital ligament of atlas and encloses the vertebral artery and the first cervical nerve root [6].
What is arcuate foramen?
In human anatomy, arcuate foramen, also known as ponticulus posticus (Latin for “little posterior bridge”) or Kimmerle’s anomaly, refers to a bony bridge on the atlas (C1 vertebra) that covers the groove for the vertebral artery.
What is Harris ring cervical spine?
Ring of Harris is a ring-like structure resulting from projection of the lateral masses of C2 on its body. Assess bony outlines for continuity. A fracture can be seen as a step in the ring outline.
What is posterior Ponticle?
The arcuate foramen (foramen arcuate atlantis, ponticulus posticus or posterior ponticle, or Kimerle anomaly) is a frequently encountered normal variant of the atlas and is easily appreciated on a lateral plain film of the craniocervical junction.
What does Ponticulus mean?
1 : a slight ridge. 2 : a bridge of transverse nerve fibers between the pyramids of the medulla and the pons.
What is Posticus?
The ponticulus posticus means “little posterior bridge” in Latin It was defined as an abnormal small bony bridge formed between the posterior portion of the superior articular process and the posterolateral portion of the superior margin of the posterior arch of the atlas.
What are alar ligaments?
The alar ligaments are strong, rounded cords, which arise one on either side of the upper part of the odontoid process, and, passing obliquely upward and lateralward, are inserted into the rough depressions on the medial sides of the condyles of the occipital bone.
What is Jefferson fracture?
A Jefferson fracture is a bone fracture of the vertebra C1. The vertebra C1 is a bony ring, with two wedge-shaped lateral masses, connected by relatively thin anterior and posterior arches and a transverse ligament. The lateral mass on vertebra C1, who is taller, is directed laterally.
What is Craniovertebral angle?
Measuring craniovertebral (CV) angle is one of the common objective methods in assessing head posture [4,7]. It is the angle formed by a horizontal line drawn through the spinous process of the seventh cervical (C7) vertebra and a line joining the spinous process of C7 vertebra with the tragus of the ear [4,7,17].
Is KFS hereditary?
In most cases, Klippel Feil syndrome (KFS) is not inherited in families and the cause is unknown. In some families, KFS is due to a genetic alteration in the GDF6, GDF3 or MEOX1 gene and can be inherited. When KFS is caused by mutations in the GDF6 or GDF3 genes, it is inherited in an autosomal dominant manner.
What is Ponticulus ear?
Conclusion: The ponticulus is present in the majority of ears. It is best defined as a bridge of bone from the pyramidal eminence to the promontory and most commonly occurs as a thin, bony structure.