Iliohypogastric nerve

Iliohypogastric Nerve is a nerve that originates from the Lumbar plexus, specifically from the anterior rami of the first lumbar nerve (L1). It is a branch of the lumbar plexus, along with the ilioinguinal nerve, genitofemoral nerve, lateral femoral cutaneous nerve, obturator nerve, and femoral nerve.

Etymology

The term "Iliohypogastric" is derived from the Greek words "ilio" meaning flank, "hypo" meaning under, and "gastric" meaning stomach. Thus, the term refers to the nerve that runs under the stomach region and towards the flank of the body.

Anatomy

The iliohypogastric nerve passes obliquely across the quadratus lumborum, then pierces the transversus abdominis to run above the iliac crest. It gives off a lateral cutaneous branch, and its terminal branch, the anterior cutaneous branch, continues to travel in the abdominal wall.

Branches

The iliohypogastric nerve has two main branches: the lateral cutaneous branch and the anterior cutaneous branch. The lateral cutaneous branch supplies the skin over the gluteal region. The anterior cutaneous branch supplies the skin of the hypogastric region.

Clinical Significance

Damage to the iliohypogastric nerve can result in loss of sensation over the gluteal and hypogastric regions. This can occur due to trauma, surgery, or diseases that affect the nervous system.

Related Terms

• Lumbar plexus
• Ilioinguinal nerve
• Genitofemoral nerve
• Lateral femoral cutaneous nerve
• Obturator nerve
• Femoral nerve
• Quadratus lumborum muscle
• Transversus abdominis muscle
• Iliac crest

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  Diagram of the lumbar plexus
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  Iliohypogastric nerve and surrounding structures
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  Iliohypogastric nerve and lumbar plexus