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UE Actions


Pectoralis Major adduct & medially rotate humerus; flex humerus
Pectoralis Minor depress & protract scapula
Serratus Anterior protracts & rotates scapula
Trapezius elevate, retract, rotate scapula
Rhomboid Major retract, elevate & downwardly rotate scapula; fix scapula to thoracic wall
Rhomboid Minor retract & elevate scapula
Levator Scapulae elevate scapula
Latissimus dorsi extend, adduct, & (especially) medially rotate humerus
Deltoid Anterior: flex/ medially rotate humerus; Lateral: abduct humerus; Posterior: extends/ laterally rotates humerus
Subscapularis medially rotate/ adduct humerus; help stabilize shoulder joint
Teres Minor lateral rotation of humerus
Infraspinatus lateral rotation of humerus
Supraspinatus helps deltoid abduct arm
Teres Major adducts & medially rotates humerus
Biceps brachii (long head) Flex GHJ and elbow, supinate forearm
Biceps Brachii (short head) Flex GHJ and elbow, supinate forearm
Coracobrachialis Flex GHJ; flex & adduct arm
Brachialis Flex elbow
Triceps Brachii (long head) extend forearm/ GHJ & elbow
Triceps Brachii (Lateral Head) extend forearm/ GHJ & elbow
Triceps Brachii (Medial Head) extend forearm/ GHJ & elbow
Pronator Teres Pronate forearm & flex elbow
Flexor Carpi Radialis Flex wrist & abduct hand
Palmaris Longus Flex wrist, tense palmar aponeurosis
Flexor Carpi Ulnaris Flex wrist & adduct hand
Flexor digitorum superficialis flex 2-5 (not thumb) at MCP/PIP (not DIP)
Flexor Digitorum Profundus Flex digits 2-5 (MCP, PIP, & especially DIP)
Flexor pollicis longus Flex thumb (MCP and IP joints)
Pronator quadratus Pronate forearm
Brachioradialis Flex elbow/ forearm
Extensor carpi radialis longus Extend/ abduct hand at wrist
Extensor carpi radialis brevis Extend/ abduct hand at wrist
Extensor Carpi Ulnaris Extend/ adduct hand at wrist
Extensor Digitorum Extend digits 2-5 (MCP); Extend wrist
Extensor digiti minimi Extend digit 5 (MCP, PIP, DIP)
Extensor indicis Extend digit 2
Extensor pollicis longus Extend thumb (CMC, MCP, PIP)
Extensor pollicis brevis Extend thumb (CMC, MCP)
Abductor pollicis longus Abduct and extend thumb
Supinator Supinate forearm
Abductor digiti minimi Abduct digit 5
Flexor digiti minimi brevis Flex proximal phalanx of digit 5
Opponens digiti minimi Bring digit 5 into opposition with thumb
Adductor pollicis Adduct thumb toward digit 3
Lumbricals 1-2 Flex digits at MCPs; extend IP joints
Lumbricals 3-4 Flex digits at MCPs; extend IP joints
Palmar interossei Adduct digits 2, 4, & 5
Dorsal interossei Abduct 2-4
Created by: Abarnard