Lateral cutaneous nerve of the forearm

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The lateral cutaneous nerve of the forearm is the terminal branch of the musculocutaneous nerve.

Lateral cutaneous nerve of the forearm

System:
Function:
Origin: Musculocutaneous nerve
Branches:
Insertion:
Arterial supply:
Venous drainage:
Lymphatic drainage:
Innervation: Skin over distal third of upper arm, anterolateral forearm, wrist and base of thenar eminence
Vertebral levels:
Search for Lateral cutaneous nerve of the forearm in Gray's.


Contents

Anatomical Course

The nerve is the distal continuation of the musculocutaneous nerve after it passes through the deep fascia below the elbow. It runs deep to the cephalic vein on the lateral forearm to the wrist, supplying all of this region. At the wrist it lies anterior to the radial artery; some filaments pierce the deep fascia here to reach the dorsal surface of the carpal bones. The remainder of the nerve travels to the base of the thenar eminence.

A small recurrent branch of the nerve ascends along the cephalic vein to supply the distal third of the upper arm.

Sensory Supply

The nerve supplies the skin over a large area of the anterolateral forearm, including the lower third of the upper arm and descending over the wrist to the thenar eminence.

Communications

Variations

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