<prompt> Musculocutaneous nerve is a branch ofRoot of brachial plexusLateral cord of brachial plexusMedial cord of brachial plexusPosterior cord of brachial plexus  <response>: 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. 