Posterior cutaneous nerve of forearm

Posterior Cutaneous Nerve of Forearm

The Posterior Cutaneous Nerve of Forearm (also known as the Dorsal Cutaneous Nerve) is a branch of the Radial Nerve that provides sensory innervation to the skin of the posterior surface of the forearm.

Etymology

The term "Posterior Cutaneous Nerve of Forearm" is derived from Latin and Greek roots. "Posterior" comes from the Latin "posterior," meaning "following," "cutaneous" is derived from the Latin "cutis," meaning "skin," and "nerve" comes from the Greek "neuron," meaning "sinew" or "string." The term "forearm" is derived from the Old English "forearm," meaning "the part of the arm before the elbow."

Anatomy

The Posterior Cutaneous Nerve of Forearm originates from the Radial Nerve, specifically from the posterior cord of the Brachial Plexus. It branches off from the radial nerve in the axilla and descends along the posterior aspect of the arm, piercing the deep fascia near the elbow to reach the skin of the forearm.

The nerve provides sensory innervation to the skin of the posterior surface of the forearm, extending from the elbow to the wrist. It does not supply any muscles.

Clinical Significance

Damage to the Posterior Cutaneous Nerve of Forearm can result in loss of sensation in the area of the skin it supplies. This can occur due to trauma, compression, or diseases affecting the peripheral nerves such as peripheral neuropathy.

Related Terms

• Radial Nerve
• Brachial Plexus
• Axilla
• Peripheral Neuropathy

See Also

• Nervous System
• Peripheral Nerve

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