Root value of radial nerve is:
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.
C3,4,5,6,7
C4,5,6,7,8
C5,6,7,8; T1
C6,7,8; T1,2
Nerve supply, Nerve Lesions