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The posterior longitudinal ligament is situated within the vertebral canal.It extends across the posterior surfaces of the bodies of the vertebrae. [1] It extends superoinferiorly between the body of the axis superiorly, [1] and (sources differ) the sacrum and possibly the coccyx [1] or upper sacral canal [2] inferiorly.
Ossification of the posterior longitudinal ligament (OPLL) is a process of fibrosis, calcification, and ossification of the posterior longitudinal ligament of the spine, that may involve the spinal dura. [1]
In the spine, there is bone formation along the anterior longitudinal ligament and sometimes the posterior longitudinal ligament, which may lead to partial or complete fusion of adjacent vertebrae. The facet and sacroiliac joints tend to be uninvolved. The thoracic spine is the most common level involved. [2]
Anterior longitudinal ligament (ligamentum longitudinale anterius), which runs down the anterior surface of the spine; Posterior longitudinal ligament (ligamentum longitudinale posterius), which is situated within the vertebral canal, and extends along the posterior surfaces of the bodies of the vertebrae
The supraspinous ligament becomes taut when the spine is fully flexed. [4] The supraspinous ligament, along with the posterior longitudinal ligament, interspinous ligaments and ligamentum flavum, help to limit hyperflexion of the vertebral column.
The bases of denticulate ligaments arise in the pia mater and are firmly attached to the arachnoid mater and dura mater at the apex. [2] The denticulate ligaments extend across the subarachnoid space between anterior nerve roots and posterior nerve roots, piercing the intervening spinal arachnoid mater to reach the dura.
Each ligament consists of two lateral portions which commence one on either side of the roots of the articular processes, and extend backward to the point where the laminae meet to form the spinous process; the posterior margins of the two portions are in contact and to a certain extent united, slight intervals being left for the passage of small vessels.
The cruciate ligament of the atlas (cruciform ligament) is a cross-shaped (thus the name) ligament in the neck forming part of the atlanto-axial joint. It consists of the transverse ligament of atlas, a superior longitudinal band, and an inferior longitudinal band. The cruciate ligament of the atlas prevents abnormal movement of the atlanto ...