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UE muscles

Upper extremity function, muscle, cord, and nerves

Action to be testedMusclesCord segmentNerve
Neck flexion Sternocleidomastoideus C1-C4 cervical spinal accessory
neck extension, neck rotation, neck lateral bending trapezius, deep neck muscles C1-C4 cervical spinal accessory
SH shrug, scapula upward rot. upper trapezius C1-C4 spinal accessory
SH. horizontal adduction pectoralis major and minor C5-C8, T1 medial/lateral pectoral
scapular downward rotation pectoralis minor C8-T1 medial pectoral
SH protraction, scapular upward rotation serratus anterior C5-C7 long thoracic
scapular elevation, downward rotation levator scapula (together with lower trapezius) C5 dorsal scapular
scapular elevation, adduction and downward rotation rhomboids C4-C5 dorsal scapular
SH abduction supraspinatus C4-C6 suprascapular
SH lat. rotation infraspinatus C4-C6 suprascapular
SH medial rotation, adduction latissimus dorsi,teres major, subscapularis C5-C8 subscapular, thoracodorsal
SH abduction, flexion, extension deltoid C5-C6 axillary
SH lateral rotation teres minor C4-C5 axillary
elbow flexion, forearm supination biceps brachii C5-C6 musculucutaneous
SH flexion, adduction coracobrachialis C6-C7 musculucutaneous
elbow flexion brachialis C5-C6 musculucutaneous
4th&5th DIP flexion flexor digitorum profundus (ulnar part) C5-T1 ulnar
wrist ulnar flexion flexor carpi ulnaris C7-T1 ulnar
thumb adduction adductor pollicis C8-T1 ulnar
5th digit abduction abductor digiti quinti C8-T1 ulnar
5th digit opposition opponens digiti quinti C7-T1 ulnar
5th digit MCP flexion flexor digiti quinti brevis C7-T1 ulnar
2nd to 5th digit MCP flexion, adduction, abduction interossei C8-T1 ulnar
forearm pronation pronator teres, pronator quadratus C6-C7 median
wrist radial flexion flexor carpi radialis C6-C7 median
wrist flexion palmaris longus C7-T1 median
2nd to 5th digit PIP flexion flexor digitorum sublimis C7-T1 median
thumb IP flexion flexor pollicis longus C7-T1 median
2nd-3rd digit DIP flexion flexor digitorum profundus(radial part) C7-T1 median
thumb abduction abductor pollicis brevis C6-T1 median
thumb MCP flexion flexor pollicis brevis C6-T1 median
thumb opposition opponens pollicis C8-T1 median
2nd-5th digit MCP flexion, IP extension lumbricals C8-T1 median
elbow flexion (and pronation) brachioradialis C5-C6 radial
elbow extension triceps brachii, anconeus C6-C8 radial
wrist radial extension extensor carpi radialis C6-C8 radial
2nd-5th digit MCP, IP extension extensor digitorum communis, extensor digiti quinti proprius C6-C8 radial
wrist ulnar extension extensor carpi ulnaris C6-C8 radial
forearm supination supinator C5-C6 radial
thumb MCP abduction abductor pollicis longus C7-C8 radial
thumb extension extensor pollicis longus/brevis C6-C8 radial
2nd digit extension extensor indicis proprius C6-C8 radial
Created by: kgranberg