Posterior scrotal nerves

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Posterior scrotal nerves are branches of the perineal nerve, which itself is a branch of the pudendal nerve. These nerves are responsible for providing sensory innervation to the skin of the posterior part of the scrotum in males and the corresponding area in females, known as the labia majora.

Anatomy

The posterior scrotal nerves originate from the perineal nerve, which is a branch of the pudendal nerve. The pudendal nerve arises from the sacral plexus, specifically from the ventral rami of the second, third, and fourth sacral nerves (S2-S4). The perineal nerve then divides into several branches, including the posterior scrotal nerves.

Function

The primary function of the posterior scrotal nerves is to provide sensory innervation to the skin of the posterior part of the scrotum. This includes the sensation of touch, pain, and temperature. In females, the equivalent nerves provide sensory innervation to the posterior part of the labia majora.

Clinical Significance

Damage or injury to the posterior scrotal nerves can result in loss of sensation or neuropathic pain in the areas they innervate. This can occur due to surgical procedures, trauma, or certain medical conditions affecting the pudendal nerve or its branches.

Related Structures

• Pudendal nerve
• Perineal nerve
• Scrotum
• Labia majora
• Sacral plexus

See Also

• Anterior scrotal nerves
• Genitofemoral nerve
• Ilioinguinal nerve