Flashcards in Ligaments of Vertebral Column Deck (26)
What was ossification of the anterior longitudinal ligament in the lumbar region identified as?
What is ossification of the anterior longitudinal ligament in the lumbar region now identified as?
Diffuse Idiopathic Skeletal Hyperostosis or DISH
What is hyperostosis?
a greater than necessary ossification of the bone at a site of ligament attachment
Where is ossification of the posterior longitudinal ligament most commonly identified?
the cervical spine with and 80% incidence
What is the gender, age, and ethnic bias associated with ossification of the posterior longitudinal ligament?
it is greater in males over 50 and has a higher incidence in the Japanese
What is the name given to the ligamentum flavum based on appearance and histology?
it is a yellow elastic ligament
What fibers are most ligaments made of?
collagen type I fibers which are whitish in appearance
What is the function of the ligamenum flavum?
It brakes or limits flexion of the vertebral column
What is now thought to be a major function of the ligamentum flavum?
it is an early prime factor in extension of the vertebral column
Were is ossification of the ligamentum flavum most commonly identified?
the thoracic spine or thoracolumbar transition zone
What is the relationship between the capsular ligament and mobility?
the more lax/loose the capsular ligament is, the greater the motion of the joint
What regions of the vertebral column demostrate the greatest laxity of capsular ligaments?
the cervical and lumbar regions
What is the status of the human interspinous ligament compared with other common ligaments?
they are poorly developed as ligaments although collagen fibers are present
What is the status of the cervical interspinous ligament?
it is lacking, poorly developed, or simply considered the deep anterior part of the ligamentum nuchae
What is now thought to be a major function of the interspinous ligament?
it is more likely a proprioceptive trasnducer for the spinal reflex
What are the layers of liamentum nuchae?
a superficial and deep layer are identified
What is the name given to the superficial layer of the ligamentum nuchae?
the funicular layer or part
What is the name given to the deep layer of the ligamentum nuchae?
the lamellar layer or part
What are the attachment sites for the superficial layer of the ligamentum nuchae?
the external occipital protuberance, external occipital crest, and spinous tubercle of C7
What is the histological make-up of the human ligamentum nuchae?
it is a yellow elsatic ligament, but has more collagen fibers than in quadrupeds
What is the termination level inferiorly for the supraspinous ligament according to current literature?
primalrily at L4(73%); between L4 and L5 (5%)
Where is the supraspinous ligament said to be best developed?
in the lumbar spine
What is now thought to be the major function of the supraspinous ligament?
it is a proprioceptive transducer for the spinal reflex
Where in the vertebral column is the intertransverse ligament best developed?
in the lumbar spine
What part of the intertransverse ligament in the lumbar spine covers the intervertebral foramen?
the ventral slip