Final Intervertebral Disc Annulus Fibrosus Flashcards Preview

Spinal Anatomy Summer 2015 > Final Intervertebral Disc Annulus Fibrosus > Flashcards

Flashcards in Final Intervertebral Disc Annulus Fibrosus Deck (13)
1

What cell type is associated with the annulus fibrosus

Fibroblast and fibrocyte

2

What compensates for the thinness of the posterior part of the cervical annulus fibrosus

Posterior longitudinal ligament

3

What is the organization of the lumbar annulus fibrosus

It has 12-14 concentric cylindrical lamellae

4

Why is the posterior part of the lumbar annulus fibrosus more susceptible to rupture, herniation, prolapse, or protrusion

The posterior margin of each lamellae is thin and the posterior longitudinal ligament is also less developed

5

What is the water concentration in the lumbar annulus fibrosus at birth and after 30

Birth: 78%
After 30: 70%

6

What is the organizational pattern for Glycosaminoglycans in the lumbar annulus fibrosus

They typically have a binding site for hyaluronic acid and are thus aggregated

7

Which type of collagen is dominant in the annulus fibrosus

Collagen type II

8

What is the organizational pattern for collagen fibers in the annulus fibrosus

They are parallel with one another in a single lamellus and angled

9

What is the organizational of collagen fibers between lamellae

Collagen fibers will be angled in the opposite direction such that a spiral counterspiral organization is observed

10

What is the average angle of collagen fibers within the annulus fibrosus

They average 50 to 60 degrees

11

What is the attachment site for collagen fibers within the annulus fibrosus

Collagen fibers of the outer lamellae will become sharpeys fibers and penetrate the epiphyseal rims
Collagen fibers of the inner lamellae will attach to the cartilaginous end plate

12

What is the origin for the cells of the annulus fibrosus

Sclerotomites

13

What is the appearance of the cervical annulus fibrosus

A horse shoe with the anterior margin thick and the lateral margins tapering to the uncinate processes; the posterior margin is thin

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