An individual is in a car accident that involves a sudden, sharp jolt but no direct penetrating injury to their back. A medical scan confirms that the bony structures around their spinal cord are intact and the cord itself is undamaged. Which feature was most crucial in absorbing the shock from the jolt to protect the delicate nerve tissue?

A patient is brought to the emergency room after a severe car accident. Imaging reveals that several of their vertebrae are fractured, and bone fragments have damaged the delicate neural tissue of the spinal cord. Which protective mechanism was primarily compromised in this specific injury?