Anatomical Relations
The anulus fibrosus is the outer component of the intervertebral disc. However, the anulus fibrosis is thinner posteriorly. They insert into the epiphyseal rim on the outer perimeter of the vertebral bodies.
Related parts of the anatomy
Function
The anulus fibrosus aids in the structural integrity of the vertebral column. The oblique arrangement of adjacent layers of fibers limits rotation and aids in the strength (Standring, 2016).
Structure
It is composed of an outer lamella of collagen fibers and inner lamellae of fibrocartilaginous tissue. The fibers of adjacent lamellae are arranged obliquely in opposite directions.
References
Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.
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Annulus Fibrosus
The annulus fibrosus is a fibrocartilaginous tissue consisting of layers of lamellae rich in highly cross-linked collagen fibrils, whereas the nucleus pulposus is more amorphous with a small percentage of randomly oriented fibrils and a large content of proteoglycans [195].
