Musculocutaneous nerve is a branch of
REF.BDC VOL.1,FIFTH EDITION.pg.88 The musculocutaneous nerve is the main nerve of the front of the arm and continues below the elbow as the lateral cutaneous nerve of the forearm.It is a branch of the lateral cord of the brachial plexus,arising at the lower border of the pectoralis minor in the axilla.
Root of brachial plexus
Lateral cord of brachial plexus
Medial cord of brachial plexus
Posterior cord of brachial plexus
Upper limb