This discs in your spine are round, and flat at the top and bottom. They reside securely between the vertebrae and provide some shock absorption fo the spine. Each disc also acts as a pivot point and provides both stability and range of motion in the lower back and neck. The outer wall of a disc is fibrous and the internal is akin to jelly — when we’re explaining discs to our patients, we often use the visual metaphor of a jelly donut.
In some cases a disc is said to have “slipped” when the firm outer shell of a spinal disc is forced outside of its normal boundary. In other cases, a disc will be said to “slip” if it develops a tear in its thick outer wall. Also known as a herniated, ruptured or bulging disc, these conditions can occur in the cervical, thoracic, and lumbar structure of the spine.