The nucleus pulposus is the soft, gel-like center of an intervertebral disc in the spine. It is composed mainly of water and collagen fibers, providing cushioning and support between the vertebrae. This structure helps absorb shock during movement and maintains the disc's shape. Surrounded by the tougher annulus fibrosus, the nucleus pulposus plays a crucial role in spinal health. When the nucleus pulposus is damaged or degenerates, it can lead to conditions such as herniated discs, which may cause pain and discomfort in the back and legs. Proper care and posture can help maintain its integrity.