The musculoskeletal system is comprised of bones, joints, muscles, tendons, cartilage, and ligaments; they function together to support the body and allow movement.
Bones and Discs 
Information on the basic spine bone and discs specializing in vertebrae, facet joints and interverebral discs.
Muscles and Ligaments 
A description of muscles and ligaments and their functions.
Spinal Cord and Nerves 
The spinal cord is a column of nerve cells and bundles of nerve fibers which connects the brain to all parts of the body.
Spinal Motion 
The spinal motion segment is also known as the functional spinal unit and represents a segmental model of spinal function