<prompt> Root value of radial nerve is:C3,4,5,6,7C4,5,6,7,8C5,6,7,8; T1C6,7,8; T1,2  <response>: Radial nerve is the continuation of posterior cord. Root value of posterior cord is C5,6,7,8 ,T1 has 5 root values Posterior cord is formed by posterior divisions of upper, middle and lower trunks. It supplies posterior compament of upper limb. 