A normal and healthy spine appears straight when viewed from the front or back. From a side view, a normal spine presents a slight “S” – shaped curve.
What parts make up the spine?
The spine is made up of 24 moveable bone segments called vertebrae. The spine is divided into three different parts. There are seven cervical or neck vertebrae, 12 thoracic or mid-back vertebrae and five lumbar or low back vertebrae.
The spine is made up of three general parts. The top part is the cervical spine, which is connected to the skull. The middle part is the thoracic vertebrae, characterized by the ribs connected to each vertebra. The bottom part is the lumbar spine. It connects with the pelvis at the sacrum.
The vertebra stack on top of one another and are separated by discs. The spine has a normal curved shape. When viewed from the side, the spine is not straight up and down, but rather curved in an “S” shape. The cervical spine has an inward curvature called “kyphosis”. The thoracic spine curves outward. This curve is called a kyphosis. The lumbar spine usually has an inward curve or a lordosis. The “S” curve seen in the side view allows for shock-absorption and acts as a spring when the spine is loaded with weight. This’ S’ – shaped curve maintains balance in the anterior and posterior planes of the spine.
The spinal cord is located within the canal formed by the vertebrae. Branching off of the spinal cord are nerve roots. These nerves then supply arm, trunk, and leg muscles for movement. They also provide energy to muscles in organs such as the bladder.
The intervertebral disc is a fluid filled cushion located between the vertebrae of the spine. Cartilage is a layer of covering on the surface of joints, which has a certain buffering effect and protects bones. It also has a certain degree of smoothness, which is helpful for activities.
Post time: Sep-18-2025