Musculocutaneous nerve
Musculocutaneous Nerve
The Musculocutaneous Nerve (pronunciation: muhs-kyuh-loh-kyoo-tay-nee-uhs nuhrv) is a significant peripheral nerve of the upper limb in the human body. It is derived from the brachial plexus, carrying fibers from the lateral cord of the brachial plexus, which come from the 5th, 6th, and 7th cervical spinal nerves.
Etymology
The term "Musculocutaneous" is derived from Latin, where "musculo" refers to muscle and "cutaneous" refers to skin. This name is given due to the nerve's function in supplying both the muscles and skin of the anterior compartment of the arm.
Function
The Musculocutaneous Nerve provides motor innervation to the muscles in the anterior compartment of the arm including the biceps brachii, brachialis, and coracobrachialis. It also provides sensory innervation to the lateral part of the forearm through its continuation as the lateral cutaneous nerve of the forearm.
Clinical Significance
Damage to the Musculocutaneous Nerve can result in weakness of flexion at the elbow and supination of the forearm, as well as sensory loss over the lateral forearm. This can occur due to trauma, compression, or iatrogenic injury during surgery.
Related Terms
External links
- Medical encyclopedia article on Musculocutaneous nerve
- Wikipedia's article - Musculocutaneous nerve
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