MUSCULOCUTANEOUS NERVE

SUMMARY

ORIGIN
1. Origin: from the lateral cord of the brachial plexus, C5, 6, 7.
2. Lies lateral to the axillary a.
3. Descends past lateral border of pactoralis minor.

COURSE & SUPPLY
4. Supplies the shoulder joint.
5. Pierces through the CORACOBRACHIALIS, supplying this muscle.
6. It then passes b/w the BICEPS & BRACHIALIS (supplying both muscles), accompanied by branches/tributaries of the brachial artery & vein.

7. Its remaining fibers, purely cutaneous now, appears at the lateral margin of the biceps tendon as the lateral cutaneous nerve of the forearm.

Image: Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/ [Accessed 21 Nov. 2018].

Reference(s)

R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone.
Gray, H., Carter, H.V. and Davidson, G. (2017). Gray’s anatomy. London: Arcturus.