Radial nerve

RADIAL NERVE:-

INTRODUCTION:

• Derived from C5,6,7,8, T1
• Largest branch of brachial plexus & arises from the posterior cord of brachial plexus.
• In the lower part of axilla, the third part of the axillary artery is related anterior to the radial Nerve.
• The lower lateral cutaneous nerve of the arm supplies the skin covering the lower half of the deltoid and upper part of the long head of the triceps.
• Ulnar collateral branch of the radial nerve accompany the ulnar nerve in tha arm Et supplies the medial head of the triceps.
• It lies in spiral groove of humerus.

SUPPLIES:

• Extensor compartment of arm, forearm (skin)
• Triceps
• Anconeus and extensors of forearm. Extension of MCP joint

BRANCHES:

 MUSCULAR INNERVATIONS:

 Medial Muscular Branch:

• Supplies medial head of the Triceps brachii(lies close to the ulnar nerve so k/a the ulnar collateral nerve).

  Posterior Muscular Branch:

• Supplies the medial and lateral heads of the Triceps brachii and the Anconeus muscles.

   Lateral Muscular Branch:

• The lateral muscular branches supplyies Brachioradialis, Extensor carpi radialis longus, and the lateral part of the Brachialis.