What is the explanation for the cervical and lumbar enlargements of the spinal cord?

The cervical and lumbar regions of the spinal cord show a larger diameter compared to the rest of the regions. The cervical enlargement and lumbar enlargement represent an increased amount of neurons in the gray matter and axons in the white matter that serve the upper limbs and lower limbs, respectively.

What are the cervical and lumbar enlargements of the spinal cord?

The spinal cord expansion that corresponds to the arms is called the cervical enlargement and includes spinal segments C5—T1; the expansion that corresponds to the legs is called the lumbar enlargement and includes spinal segments L2—S3.

What causes cervical enlargement of the spinal cord?

As the spinal cord is shorter in length than the vertebral column, it extends from the C3 to T1/T2 vertebral levels, its greatest circumference (approximately 38 mm) at the C6 level. The cervical enlargement is a result of the increased volume of motor cells in the ventral horns of the grey matter.

What are the two areas of the spinal cord?

The two areas of the spinal cord most commonly injured are the cervical spine (C1–C7) and the lumbar spine (L1–L5). (The notation C1, C7, L1, L5 refer to the location of a specific vertebra in either the cervical, thoracic, or lumbar region of the spine.)

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What are 2 enlargements of the spinal cord?

Two enlargements of the spinal cord can be visualized: The cervical enlargement, which extends between C3 to T1; and the lumbar enlargements which extends between L1 to S2 (Figure 3.1). The cord is segmentally organized. There are 31 segments, defined by 31 pairs of nerves exiting the cord.

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.

What is the primary purpose of the spinal cord?

The spinal cord is a complex organization of nerve cells responsible for movement and sensation. It carries signals between the brain and the rest of the body.

What is the level of the cervical enlargement in the spinal cord?

As the spinal cord is shorter in length than the vertebral column, it extends from the C3 to T1/T2 vertebral levels, its greatest circumference (approximately 38 mm) at the C6 level. The cervical enlargement is a result of the increased volume of motor cells in the ventral horns of the grey matter.

What part of the spinal cord represents an increase in cell body?

The cervical and lumbar regions of the spinal cord show a larger diameter compared to the rest of the regions. The cervical enlargement and lumbar enlargement represent an increased amount of neurons in the gray matter and axons in the white matter that serve the upper limbs and lower limbs, respectively.

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Is cervical stenosis worse than lumbar?

The two types of spinal stenosis are lumbar stenosis and cervical stenosis. Lumbar spinal stenosis is the more common of the two, but cervical spinal stenosis is often more dangerous since it involves compression of the spinal cord.

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