What is a posterior Ponticulus?
The posterior atlantooccipital ligament is a protector of the groove where the vertebral artery passes at the C1. But instead of the ligament turning into stone, the ligament turned into bone. Specifically, the ponticulus posticus formed as a result of ossification of the posterior atlantooccipital ligament.
What is Kimmerle anomaly?
Kimmerle anomaly is the bony ridge between the lateral mass of atlas and its posterior arch or transverse process.
What is the arcuate foramen?
The arcuate foramen is an anatomic variant that is thought to arise from ossification of the posterior atlanto-occipital membrane. Owing to potential entrapment of the vertebral artery segment that traverses the foramen, vertebrobasilar ischemia may occur, and the person may experience vertigo, headache, or neck pain.
What membrane is calcified as a posterior Ponticus?
-atlanto occipital membrane
Literature reveals a higher incidence in females compared with males and this anomaly was age independent. This additional bone formation is formed by the calcification of posterior-atlanto occipital membrane.
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].
Where is the posterior atlanto occipital membrane?
The posterior atlantooccipital membrane (posterior atlantooccipital ligament) is a broad but thin membrane. It is connected above to the posterior margin of the foramen magnum and below to the upper border of the posterior arch of the atlas. It is a continuation from the Ligamentum Flavum.
What causes Ponticulus Posticus?
What is a congenital block vertebra?
Block vertebra is a congenital failure of segmentation of somites. Secondary to the fusion, these vertebrae are not amenable to degenerative changes, however the additional stress is transferred on to the distal joint. They may be accompanied by neural foraminal narrowing or enlargement.
Where is the arcuate foramen located?
atlas
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 the alar ligament?
The alar ligaments join the lateral margins of the sloping upper posterior margin of the dens of C2 to the lateral margins of the foramen magnum (adjacent to the occipital condyles) and lie on either side of the apical ligament. They may be oblique or vertical and are thickest at the occipital attachment.
What movement does the atlanto-occipital joint allow?
neck flexion
The atlas and the occipital bone form the atlanto-occipital joint, which allows neck flexion. When you nod your head as if to say “yes,” that is neck flexion. The atlas and axis form the atlanto-axial joint, which allows head rotation.
What does ponticulus posticus mean in medical terms?
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.
Who is the best doctor for ponticulus posticus?
Ross Hauser, MD. Your doctor told you about ponticulus posticus. He/she may have told you that this is a somewhat rare condition and it may or may not be the cause of your health issues. But you wanted to learn more because this may be why you have headache, migraine, double vision, dizziness or orofacial (mouth and face) pain.
How does dr.hauser explain ponticulus posticus?
In this snap shot from the video belwop, Dr. Hauser shows the development of Ponticulus Posticus in a Digital Motion X-Ray of a patient. Dr.
What does the term ponticulus lateralis mean?
Expanatory note: The term ponticulus lateralis refers to when the ponticulus posticus bony bridge takes a vertical spike upwards to directly compress the vertebral artery. In some cases, the bony ridge may also be formed at the level of the vertebral artery emerging from the transverse process of the С1 vertebra (this is ponticulus lateralis).
