6/17/25 Ligaments of Vertebral Column and Intervertebral Discs

Question 1

True or False: Ligaments work when they become taut

Answer 1

True

Question 2

Anterior longitudinal ligament

Answer 2

This strong, broad ligament extends along the entire length of the vertebral column covering the anterior 1/3 of each body. It limits extension (prevents hyperextension) and reinforces the anterior portion of the intervertebral disc.

Question 3

Posterior longitudinal ligament

Answer 3

It lies on the anterior wall of the vertebral canal. It is narrow as it crosses the posterior surfaces of the vertebral bodies but flares out to blend with the anulus fibrosus of the intervertebral discs. However, it incompletely reinforces the anulus fibrosus posteriorly. Consequently, intervertebral disc herniation is usually posterolateral, where the anulus is not reinforced. This ligament limits flexion.

Question 4

Ligamentum flavum

Answer 4

This ligament links the laminae of adjacent vertebrae along the posterior wall of the vertebral canal. It is unique because of the high content of yellow elastic tissue. The ligamentum flavum is stretched, similar to a rubber band, during flexion of the vertebral column and its elastic recoil assists in extension of the column.

Question 5

Supra- and interspinous ligaments

Answer 5

These attach spinous processes of adjacent vertebrae and prevent hyperflexion. They are usually very weak in humans. During a midline approach for a spinal tap, the needle traverses these ligaments.

Question 6

Which 2 ligaments line the vertebral canal?

Answer 6

Posterior longitudinal
Ligamentum flavum