Figure 1. (side view) The neck region is called the cervical spine. Protected within the bones of the cervical spine are the spinal cord and nerves. The seven cervical bones (vertebrae) are numbered C1 to C7. Each bone is separated and cushioned by shock-absorbing discs. The spinal nerves pass through bony canals to branch out to the neck and arms.
Chiropractors use hands-on spinal manipulation and other alternative treatments, the theory being that proper alignment of the body's musculoskeletal structure, particularly the spine, will enable the body to heal itself without surgery or medication. Manipulation is used to restore mobility to joints restricted by tissue injury caused by a traumatic event, such as falling, or repetitive stress, such as sitting without proper back support.