What is the definition or description of: back injury?

Back damage: A back injury may result from direct or indirect trauma to the back. This may occur from lifting, fall, car accident, etc. This may produce damage to bones, disks, muscles, ligaments, joints, nerves, spinal cord or brain producing pain (most common), numbness, weakness, paralysis or even death. You should seek medical attention if you injured your back.

A traumatic event : That overloads the supporting tissues of the back which include: muscles, ligaments, joints, discs and bones which may or may not lead to an unstable spine and/or neural tissue involvement. The degree of injury is dependent on multiple factors such as the amount of force, force direction, stability of the spine, etc.