Posterior Longitudinal Ligament
Description
-
The PLL is marked in blue -
![Illustration of a lateral view of the upper cervical spine depicts the three-column model with the PLL in red[1]](/w/images/thumb/1/15/Atlanto_occipital_junction_posterior_longitudinal_ligament.jpeg/120px-Atlanto_occipital_junction_posterior_longitudinal_ligament.jpeg)
Illustration of a lateral view of the upper cervical spine depicts the three-column model with the PLL in red[1] -
![Cervical spine ligaments anatomy including the PLL[2]](/w/images/thumb/b/bf/Cervical_spine_ligament_anatomy.jpeg/119px-Cervical_spine_ligament_anatomy.jpeg)
Cervical spine ligaments anatomy including the PLL[2] -
![(A) Ossification of the posterior longitudinal ligament (OPLL) in the cervical spine (white arrow). (B) OPLL from the lower thoracic spine to the lumbar spine (white arrow).[3]](/w/images/thumb/d/d3/MRI_ossification_posterior_longitudinal_ligament.jpeg/120px-MRI_ossification_posterior_longitudinal_ligament.jpeg)
(A) Ossification of the posterior longitudinal ligament (OPLL) in the cervical spine (white arrow). (B) OPLL from the lower thoracic spine to the lumbar spine (white arrow).[3] -
![Representative radiographs of subtypes of ossification of posterior longitudinal ligament.[4]](/w/images/thumb/c/cd/Posterior_longitudinal_ligament_ossification_xray.jpeg/120px-Posterior_longitudinal_ligament_ossification_xray.jpeg)
Representative radiographs of subtypes of ossification of posterior longitudinal ligament.[4]
![Illustration of a lateral view of the upper cervical spine depicts the three-column model with the PLL in red[1]](/File:Atlanto_occipital_junction_posterior_longitudinal_ligament.jpeg)
![Cervical spine ligaments anatomy including the PLL[2]](/File:Cervical_spine_ligament_anatomy.jpeg)
![(A) Ossification of the posterior longitudinal ligament (OPLL) in the cervical spine (white arrow). (B) OPLL from the lower thoracic spine to the lumbar spine (white arrow).[3]](/File:MRI_ossification_posterior_longitudinal_ligament.jpeg)
![Representative radiographs of subtypes of ossification of posterior longitudinal ligament.[4]](/File:Posterior_longitudinal_ligament_ossification_xray.jpeg)
Name
- Posterior Longitudinal Ligament
- PLL
- Posterior vertebral ligament
- Posterior spinal longitudinal ligament
- Posterior ligament of the vertebral column
- Posterior longitudinal spinal ligament
Description
- Runs along the posterior surface of the vertebral bodies within the vertebral canal
- Originates along vertebral body of C2, tectorial membrane of the skull
- Inserts distally on the sacrum
- Much narrower than the anterior longitudinal ligament
Function
- Resists hyperflexion of the vertebral column
- Helps prevent posterior herniation of the nucleus pulposus
Clinical Significance
- Herniated Nucleus Pulposus
- Cervical Myelopathy
- Ossification of the Posterior Longitudinal Ligament
- Many types of spinal trauma
- Degenerative Disc Disease
See Also
References
- ↑ Utz, Michael, et al. "MDCT and MRI evaluation of cervical spine trauma." Insights into imaging 5.1 (2014): 67-75.
- ↑ Laban, Othman Shukri Abdelkarim Abu. Modelling of Whiplash Trauma; Parametric Study of Rear-End Collision and Development of Head-Restraint System. MS thesis. Qatar University (Qatar), 2017.
- ↑ Yamasaki, Noriko, Junki Mizumoto, and Taro Shimizu. "Spinal Deformity Manifested by Urinary Tract Infection: A Case of Acute-on-Chronic Mobility Dysfunction." Cureus 16.3 (2024).
- ↑ Sasaki, Eiji, et al. "Prevalence and symptom of ossification of posterior longitudinal ligaments in the Japanese general population." Journal of Orthopaedic Science 19.3 (2014): 405-411.
- ↑ Ezra, David, et al. "Prevalence and characteristics of osseous bridging between vertebral bodies in the cervical spine: A skeletal study." Clinical Anatomy (2024).
- ↑ Akinci, Saliha Zeyneb, and Yunus Ziya Arslan. "Finite element spine models and spinal instruments: a review." Journal of Mechanics in Medicine and Biology 22.04 (2022): 2230001.