Posterior labial nerves

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Nerves of the female genitalia

Posterior labial nerves

Latin	nervi labiales posteriores

The posterior labial nerves are branches of the pudendal nerve that provide sensory innervation to the labia majora and labia minora in females. These nerves are crucial for the sensation in the external female genitalia.

Anatomy

The posterior labial nerves originate from the pudendal nerve, which itself arises from the sacral plexus, specifically from the ventral rami of the second, third, and fourth sacral nerves (S2-S4). The pudendal nerve travels through the greater sciatic foramen, around the ischial spine, and re-enters the pelvis through the lesser sciatic foramen. It then courses through the pudendal canal (also known as Alcock's canal) before branching into the perineal nerves, which include the posterior labial nerves.

Function

The primary function of the posterior labial nerves is to provide sensory innervation to the labia majora and labia minora. This includes the sensation of touch, pain, and temperature, which are essential for sexual function and overall genital health.

Clinical Significance

Damage or injury to the posterior labial nerves can result in loss of sensation or chronic pain in the areas they innervate. Such damage can occur due to surgical procedures, trauma, or conditions such as pudendal neuralgia. Proper identification and preservation of these nerves during surgical procedures are crucial to prevent postoperative complications.

See also

• Pudendal nerve
• Labia majora
• Labia minora
• Perineal nerve
• Pudendal neuralgia