How many sections are there in a 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. The cervical section of the spine is made up of the top seven vertebrae in the spine, C1 to C7, and is connected to the base of the skull.

How many bone sections are in the spine?

Stacked up like a tower of lego, the spinal column is made of 33 bones called vertebrae and is divided into five sections or regions. Our spine allows us to stand upright, bend and twist. A healthy spine has strong muscles and bones, flexible joints, ligaments and tendons, and sensitive nerves.

Is the spine made up of 4 sections?

The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused.

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. The cervical section of the spine is made up of the top seven vertebrae in the spine, C1 to C7, and is connected to the base of the skull.

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What absorbs shock in the spine?

The intervertebral discs are soft structures which act as shock absorbers between each of the vertebrae (bones) in the spine. A single disc sits between each vertebra.

Which portions of the spine are the most vulnerable to injury?

The majority of fractures and dislocations of the spinal column occur in the cervical spine because it is the most mobile portion of the spinal column, and understandably, the most vulnerable to injury.

What part of your spine controls your legs?

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.

What is the lower part of your spine called?

The bottom of the spine is called the sacrum. It is made up of several vertebral bodies usually fused together as one. The remaining small bones or ossicles below the sacrum are also fused together and called the tailbone or coccyx.

What bone is responsible for turning the head?

The atlas and the occipital bone form the atlanto-occipital joint, which allows neck flexion. When you nod your head as if to say “yes,” that is neck flexion. The atlas and axis form the atlanto-axial joint, which allows head rotation. If you shake your head as if to say “no,” that is head rotation.

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What are the main components of the back?

The human spine is divided into three sections: 1) the cervical spine or neck is made up of 7 vertebrae, 2) the thoracic spine made up of 12 vertebrae and 3) the lumbar spine or low back which consists of 5 vertebrae. The discs are located between each vertebra allowing for bending, twisting and shock-absorption.

How many pairs of spinal nerves do we have?

There are 31 pairs of spinal nerves and roots. Eight pairs of cervical nerves exit the cervical cord at each vertebral level. One member of the pair exits on the right side and the other exits on the left. The first cervical root exits above the C1 vertebra.

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