mellomvirvelskiven

Mellomvirvelskiven, also known as an intervertebral disc, is a crucial component of the vertebral column. These shock-absorbing pads are located between adjacent vertebrae in the spine. Each disc consists of two main parts: the annulus fibrosus, a tough outer ring of fibrous cartilage, and the nucleus pulposus, a gel-like inner core. This structure allows the discs to withstand significant compression and shear forces, enabling movement of the spine while preventing the vertebrae from grinding against each other.

The nucleus pulposus is primarily composed of water and proteoglycans, which give it its viscous, jelly-like consistency. This hydration is essential for the disc's ability to cushion impacts and distribute pressure evenly across the vertebral bodies. The annulus fibrosus, made of concentric layers of collagen fibers, anchors the nucleus pulposus and provides structural integrity to the disc.

Over time, intervertebral discs can undergo degenerative changes, a process often referred to as disc degeneration. This can lead to a loss of water content in the nucleus pulposus, causing the disc to shrink and become less effective at cushioning. This degeneration can contribute to various spinal conditions, including herniated discs and spinal stenosis, potentially causing pain and other symptoms. Maintaining good posture and engaging in regular, appropriate exercise can help support the health of these vital structures.