When viewed from the side, an adult spine has a natural S-shaped curve. The neck (cervical) and low back (lumbar) regions have a slight concave curve, and the thoracic and sacral regions have a gentle convex curve (Fig.
What is the spine shape?
The normal spine has an S-shaped curve when viewed from the side. This shape allows for an even distribution of weight and flexibility of movement.
Why is the vertebral column S-shaped?
From top to bottom, an ideal spine has an outward-inward-outward curve, thus taking the shape of an S. First and foremost, proper curvature of the spine gives it flexibility and creates support. The offsetting curves of each section create a spring-like structure, enabling the spine to act as a natural shock-absorber.
What are the ridges in your spinal column called?
The spinous process protrudes from the back of the spine, and these are the ridges that can be felt through the skin along the back of the spine.
Should your spine be perfectly straight?
Just as the shapes of peoples’ bodies differ, the normal spine varies in size and shape. You may have been told to “stand up straight,” but no one’s spine is perfectly straight. The healthy spine has front-to-back curves (normal cervical lordosis, thoracic kyphosis, and lumbar lordosis).
Is the spine meant to curve?
A healthy spine when viewed from the side has gentle curves to it. The curves help the spine absorb stress from body movement and gravity. When viewed from the back, the spine should run straight down the middle of the back.
What is a normal spine curve?
A normal curvature of the spine appears in the neck and lower back areas of the spine. While most people have a slight sideways curve, the spine should not curve more than 10 degrees to the left or right. …
What are the 5 areas of the spine?
The spine is composed of 33 bones, called vertebrae, divided into five sections: the cervical, thoracic, and lumbar spine sections, and the sacrum and coccyx bones.
Is lumbar part of spine?
The lumbar region of the spine, more commonly known as the lower back, consists of five vertebrae labeled L1 through L5. The lumbar region is situated between the thoracic, or chest, region of the spine, and the sacrum.
Which spinal nerves affect which parts of the body?
The nerves of the cervical spine go to the upper chest and arms. The nerves in your thoracic spine go to your chest and abdomen. The nerves of the lumbar spine then reach to your legs, bowel, and bladder. These nerves coordinate and control all the body’s organs and parts, and let you control your muscles.