NPTE: muscles

actions > innervations > origins/insertions

pectoralis major

shoulder flexion, IR, horizontal add, scapular protraction/depression

lateral pectoral n

pectoralis minor

scapular protraction/down rotation/depression

medial pectoral n

serratus anterior

scapular upward rotation, protraction, depression

long thoracic n

trapezius

scapular elevation/retraction/depression

CN XI (spinal accessory n)

rhomboid major/minor

shoulder add, scapular retraction/elevation

dorsal scapular n

levator scapulae

scapular elevation/down rotation

C3-C4 (ventral rami of spinal nerves), dorsal scapular n

sternocleidomastoid

ipsi cervical lateral flex and contralateral cervical rot

CN XI (spinal accessory n)

latissimus dorsi

shoulder IR, add, ext

thoracodorsal n

deltoid

shoulder abd, flex, ext

axillary n

teres major

shoulder IR, ext, add

lower subscapular n

coracobrachialis

shoulder flex

musculocutaneous n

subscapularis

shoulder IR, adduct

upper/lower subscapular n

supraspinatus

shoulder abd up to 15 deg

suprascapular n

infraspinatus

shoulder ER

suprascapular n

teres minor

shoulder ER

axillary n

biceps (long/short head)

shoulder flex, elbow flex, supination

musculocutaneous n

brachialis

elbow flex

musculocutaneous n

triceps (long head, medial head, lateral head)

shoulder ext, elbow ext

radial n

brachioradialis

elbow flex

radial n.

anconeus

weak elbow ext

radial n

extensor carpi radialis longus/brevis

wrist ext, radial dev

radial n

extensor digitorum

ext MCP and IP 2nd-5th

radial n

extensor digiti minimi

extend MCP and IP of 5th

radial n

extensor carpi ulnaris

wrist ext, ulnar dev

abductor pollicis longus

abd and ext CMC of 1st

radial n

extensor pollicis brevis

ext MCP, CMC of 1st

radial n

extensor pollicis longus

ext MCP, CMC of 1st

radial n

extensor indicis

wrist and finger ext of 2nd

radial n

supinator

supination

radial n

pronator teres

pronation, elbow flex

median n

flexor carpi radialis

wrist flex, radial dev

median n

palmaris longus

wrist flex

median n

flexor carpi ulnaris

wrist flex, ulnar dev

ulnar n

flexor digitorum superficialis

flex PIPs of 2nd-5th

median n

flexor digitorum profundus

flex wrist, flex DIP 2nd-5th

ulnar/median n

flexor pollicis longus

flex distal phalanx 1st

median n

pronator quadratus

pronation

median n

abductor pollicis brevis

abduction MCP, CMC of 1st

median n

flexor pollicis bbrevis

flexion 1st

median n

opponens pollicis

opposition 1st

median n

adductor pollicis

adduction 1st

ulnar n

abductor digiti minimi

abduction at MCP 5th

ulnar n

flexor digiti minimi

flexion of 5th

ulnar n

opponens digiti minimi

flexion of 5th, opposition of 5th

ulnar n

lumbricals

flex at MCP, ext at IP

ulnar/median n

dorsal interossei

abduction 2nd/3rd/4th from midline

ulnar n

palmar interossei

adduction 2nd/4th/5th towards 3rd, flex at MCP, ext at IP

ulnar n