Lumbar splanchnic nerves

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Lumbar splanchnic nerves are nerves that originate from the lumbar region of the spinal cord. They are part of the sympathetic nervous system, which is responsible for the body's 'fight or flight' response. The lumbar splanchnic nerves are involved in the innervation of the pelvic organs.

Etymology[edit | edit source]

The term 'splanchnic' is derived from the Greek word 'splanchnon', which means 'viscera' or 'internal organs'. This reflects the role of the splanchnic nerves in innervating the internal organs of the body.

Anatomy[edit | edit source]

The lumbar splanchnic nerves arise from the anterior rami of the first to fourth lumbar spinal nerves. They pass through the lumbar plexus and the superior hypogastric plexus before reaching the inferior hypogastric plexus, where they provide innervation to the pelvic organs.

Function[edit | edit source]

The lumbar splanchnic nerves carry sympathetic fibers to the pelvic organs. These fibers are responsible for various functions, including the regulation of blood flow to the pelvic organs, the control of the smooth muscle in the walls of these organs, and the modulation of pain signals from the pelvic region.

Clinical significance[edit | edit source]

Damage to the lumbar splanchnic nerves can result in a range of symptoms, depending on the specific organs affected. These can include pelvic pain, urinary incontinence, and sexual dysfunction. In some cases, surgical intervention may be required to repair or remove the damaged nerves.

Related terms[edit | edit source]

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