Skip to main content

Musculocutaneous Nerve

by
Last updated: Sep 9th, 2025
Musculocutaneous Nerve
Click to View Larger Image

The musculocutaneous nerve in the arm is formed by splitting the brachial plexus at the inside border of the pectoral muscles into two branches. These branches continue to split as they run down through the upper arm, forearm, and into the wrist and hand. In the leg, the superficial peroneal nerve (also called musculocutaneous nerve) passes between the peronei and the extensor digitorum longus, pierces the deep tissues of the lower third of the leg, and divides into a medial and intermediate dorsal cutaneous nerve.