Brachial plexus: Formed by Anterior Primary Rami of Spinal nerves C5 C6 C7 C8&T1 Brachial Plexus consists of: Roots Trunks Divisions Cords a). Roots Formed by ant, primary rami of C5 C6 C7 C8 T1 b). Trunks i. Upper trunk formed by union of C5&C6 ii. Middle Trunk formed by C7 iii. Lower Trunk formed by union of C8&T1 c). … [Read more...]