Bandbrjósk

Bandbrjósk, also known as annular cartilage, refers to the ring of fibrocartilage that surrounds the periphery of the intervertebral disc. This structure plays a crucial role in spinal biomechanics and stability. The annulus fibrosus is composed of concentric lamellae, which are layers of collagen fibers oriented at oblique angles to each other. This layered arrangement provides significant tensile strength and allows the disc to withstand considerable rotational and compressive forces. The outer layers of the annulus fibrosus are particularly rich in collagen and are firmly attached to the vertebral bodies.

The inner layers of the annulus fibrosus are more cellular and contain a higher proportion of proteoglycans, contributing to its ability to absorb shock and distribute pressure. The nucleus pulposus, the gel-like center of the intervertebral disc, is contained within this fibrocartilaginous ring. Degeneration of the bandbrjósk is a common factor in various spinal conditions, including disc herniation and degenerative disc disease. Tears or weakening of the annulus fibrosus can lead to the nucleus pulposus protruding, causing pain and neurological symptoms. The structural integrity of the bandbrjósk is essential for maintaining proper spinal alignment and function throughout life.