Lumbar enlargement

Lumbar enlargement is a specific segment of the spinal cord that is responsible for innervating the lower limbs. It is located between the ninth thoracic vertebra (T9) and the second lumbar vertebra (L2). The lumbar enlargement is a crucial part of the nervous system, as it facilitates communication between the brain and the lower body.

Anatomy

The anatomy of the lumbar enlargement is complex. It is wider than the rest of the spinal cord, which allows it to house the additional neurons needed to control the lower limbs. The lumbar enlargement is also characterized by its high concentration of grey matter, which contains the cell bodies of neurons.

Function

The primary function of the lumbar enlargement is to provide innervation to the lower limbs. This is achieved through the lumbar nerves, which branch off from the lumbar enlargement and extend to various parts of the lower body. These nerves carry signals from the brain to the muscles in the legs, allowing for movement and sensation.

Clinical significance

Damage to the lumbar enlargement can result in a variety of neurological disorders, including paraplegia and cauda equina syndrome. These conditions can cause loss of sensation, muscle weakness, and even paralysis in the lower body. Treatment for these conditions often involves neurosurgery to repair the damaged area of the spinal cord.

See also

• Spinal cord
• Lumbar nerves
• Neurological disorders

References

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