<prompt> Root value of thoracodorsal nerve ?C5,C6,C7C8,T1C6,C7,C8Ti T2  <response>: Ans. is c i.e., C6C7C8Branches of brachial plexus Branches of brachial plexus arises from different anatomical segments : - 1. Branches of the rootsNerve to serratus anterior long thoracic nerve C5, C6, C7.Nerve to rhomboideus dorsal scapular nerve C5. 2. Branches of the trunksThese arise only from the upper trunk which gives two branches. I. Suprascapular nerve C5, C6Nerve to subclavius C5, C6 3. Branches of the cords 1. Branches of lateral cordLateral pectoral C5-C7Musculocutaneous C5-C7Lateral root of median C5-C7 2. Branches of medial cordMedial pectoral C8, T1Medial cutaneous nerve of arm C8, TOMedial cutaneous nerve of forearm C8, Ti.Ulnar C7, C8, Ti. C7 fibres reach by a communicating branch from lateral root of median nerve.Medial root of median C8, T1. 3. Branches of posterior cordUpper subscapular C5, C6Nerve to latissimus dorsi thoracodorsal C6, C7, COLower subscapular C5, C6Axillary circumflex C5, C6Radial C5-C8, T1 