What is the function of intervertebral discs in the spine?

The intervertebral discs play a crucial role in the structure and function of the spine, primarily by absorbing shock and allowing movement between the vertebrae. These discs are located between each pair of vertebrae and consist of a tough outer layer known as the annulus fibrosus and a gel-like center called the nucleus pulposus. This unique structure enables the discs to act as flexible cushions that can compress and expand under load, thereby absorbing impact during activities such as walking, running, or jumping. Additionally, the discs facilitate a wide range of movements, including bending and twisting, by allowing the vertebrae to move relative to one another while maintaining overall spinal stability.

Moreover, the ability of the intervertebral discs to absorb shock is critical for protecting the vertebrae and the spinal cord from the stresses and strains of everyday activities. Their role in movement also enhances the overall flexibility of the spine, which is important for maintaining a healthy range of motion and preventing injury.

In summary, the primary function of intervertebral discs is to absorb shock and permit movement between the vertebrae, ensuring both mobility and protection for the spinal column.