<prompt> Root value of long thoracic nerve:C-3,4, 5C-5, 6, 7C-7, 8 T-1C-2, 3, 4  <response>: Ans. b. C-5, 6, 7 Ref: BDC 5vol-I54, 55; Lasts Anatomy 11e p55; Grays Anatomy 40e p819Long thoracic nerve is branch of trunk forming brachial plexus with root value of C-5, 6, 7.Branches of the plexus for the upper limbBranches of the Roots:Nerve to serratus anterior Long thoracic nerve C5,6,7QNerve to rhomboideus Dorsal Scapular nerve C5QBranches of the Trunks: Arise only from upper trunkSuprascapular nerve C5,6QNerve to Subclavius C5,6QBranches of the Cords:Branches of lateral Cord LMLLateral Pectoral C5-C6QMusculocutaneous C5-C7QLateral root of median C5-C7QBranches of medial cord 4 MUMedial pectoral C8-T1QMedial cutaneous nerve of arm C8-T1QMedial cutaneous nerve of forearm C8-T1QMedial root of median C8-T1QUlnar C7,8-T1QBranches of Posterior cord ULNARUpper suhscapular C5-C6QLower subscapular C5-C6QNerve to latissimus dorsi Thoracodorsal C6,7,8QAxillary C5-C6QRadial C5,6,7,8-T1Q 