Table 1

Innervation of upper limb muscles

Muscle	Nerve	Cord	Trunk	Roots
APB, abductor pollicis brevis; EDC, extensor digitorum communis; FCR, flexor carpi radialis; FCU, flexor carpi ulnaris; FDI, first dorsal interosseous.
Supraspinatus	Suprascapular	–	Upper	C4,C5, C6
Deltoid	Axillary	Posterior	Upper	C5, C6
Biceps	Musculo-cutaneous	Lateral	Upper	C5, C6
Brachioradialis	Radial	Posterior	Upper	C5, C6
FCR	Median	Lateral and medial	Upper and middle	C6, C7, C8
EDC	Radial	Posterior	Lower and middle	C7, C8, T1
Triceps	Radial	Posterior	Upper	C7, C8, T1
APB	Median	Medial	Lower	C7, C8
FCU	Ulnar	Medial	Lower	C8, T1
FDI	Ulnar	Medial	Lower	C8, T1