What is Membrana Tectoria?
Description. The membrana tectoria is situated within the vertebral canal. It is a broad, strong bands which covers the odontoid process and its ligaments, and appears to be a prolongation upward of the posterior longitudinal ligament of the vertebral column.
What does the posterior longitudinal ligament do?
The posterior longitudinal ligament connects and stabilizes the bones of the spinal column. It runs almost the entire length of the spine, from the 2nd vertebra in the cervical spine (neck) all the way down to the sacrum (end of the spine).
What movement does the posterior longitudinal ligament limit?
flexion
Limits flexion of the vertebral column and reinforces the intervertebral disc.
Does the posterior longitudinal ligament limit flexion?
The Posterior Longitudinal Ligament runs up and down behind (posterior) the spine and inside the spinal canal….Primary Spinal Ligaments Include:
| Ligament | Spinal Region | Limits… |
|---|---|---|
| Posterior Longitudinal | Axis – Sacrum | Flexion & reinforces back of annulus fibrosis |
Which of the following ligaments is the upward continuation of Membrana Tectoria?
The axis is connected to the occipital bone by membrana tectoria, which is the upward continuation of the posterior longitudinal ligament, the alar ligaments between the lateral aspect of the apex of the dens and medial side of the occipital condyles, the apical ligament of the dens between the apex of the dens and the …
Is OPLL serious?
Spinal ossification of the posterior longitudinal ligament (OPLL) is a serious disorder that causes vertebral ligament calcification and gradual growth, resulting in spinal stenosis and, in severe cases, nerve paralysis due to spinal cord compression.
Why is anterior longitudinal ligament stronger?
While anteriorly the ligament is thin due to the elastic fibers, the posterior capsule of each posterior joint is thicker due to the collagenous content.
What causes calcification of the posterior longitudinal ligament?
Causes of ossification of posterior longitudinal ligament The exact cause of OPLL is unknown, but it typically occurs when the soft tissues on the spine calcify and narrow the spinal canal. This causes the compression on the nerves in the cervical spinal cord.
How far does the anterior longitudinal ligament go?
A primary spine stabilizer about one-inch wide, the ALL runs the entire length of the spine from the base of the skull,via the cervical spine, thoracic spine and lumbar spine to the sacrum.
What makes up the cruciform ligament?
The cruciate ligament of the atlas consists of the transverse ligament of the atlas, a superior longitudinal band, and an inferior longitudinal band. The superior longitudinal band connects the transverse ligament to the anterior side of the foramen magnum (near the basilar part) in the occipital bone of the skull.