- Discussion:
- derives from
lateral cord (
C5,
C6):
- musculocutaneous nerve passes through coracobrachialis; between
biceps &
brachialis, & becomes
lateral antebrachial cutaneous nerve at elbow;
- it has only muscular branches above elbow & only sensory branches below;
- lesion of this nerve produces weakness of elbow flexion and supination and loss of sensation on the lateral aspect of the forearm;
- this muscle is vulnerable to injury from retractors placed under the coracoid muscles;
- Identification of Musculocutaneous Nerve during Shoulder Reconstruction;
- before a retractor is placed in medial side of incision to retract conjoined muscles and
pectoralis major, it is important to identify or palpate the musculocutaneous
nerve as it enters the conjoined tendon;
- ordinarily nerve enters
coracobrachialis &
biceps from medial aspect approx 5 cm distal to the tip of the coracoid process;
An anatomic study of the musculocutaneous nerve and its relationship to the coracoid process.
Compression of the musculocutaneous nerve at the elbow.
Anatomy and internal topography of the musculocutaneous nerve: the nerves to the biceps and brachalis muscles. P Chiarapattanakom MD. J. Hand Surg. Vol 23-A. No 2. March 1998. p 250.
