The spine is a chain of bones in the human body that extends from the head to the pelvis (hip bone) and is known as the main vertebral column. The spine is made up of 33 individually movable bone segments and is divided into five regions: the neck (cervical), chest (thoracic), lower back (lumbar), sacrum, and coccyx.

The most important function of the spine is to support the body, allow movement, and protect the central nervous system structures called the spinal cord. The spine is also a structure where muscles, tendons, and ligaments attach.

Common spine health problems include neck and back pain, herniated discs, spinal fractures, scoliosis, spinal cord injuries, and other conditions. Different treatment options are available for maintaining and treating spine health, including medication, physical therapy, surgery, and exercise programs.