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Duke Orthopaedics
presents
Wheeless' Textbook of Orthopaedics

Musculocutaneous Nerve



- 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

Is the musculocutaneous nerve really in the coracobrachialis muscle when performing an axillary block? An ultrasound study.




Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Wednesday, April 11, 2012 10:20 am