UE Muscle Chart Flashcards by Michelle Choi

Trapezius
(actions, innervation)

Superior fibers: Elevate and superiorly rotate scapula
Middle fibers: retract scapula
Inferior fibers: depress scapula

Innervated by CNXI (accessory nerve)

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Levator scapulae
(actions, insertion, innervation)

elevates and inferiorly rotates scapula
inserts: superior medial border of scapula
innervate: dorsal scapular nerve

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Rhomboid major
(actions, insertion, innervation)

elevates, retracts, and inferiorly rotates scapula
insert: medial border of scapula
innervation: dorsal scapular nerve

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Rhomboid minor
(actions, insertion, innervation)

elevates, retracts, and inferiorly rotates scapula
inserts: superior medial border of scapula
innervation: dorsal scapular nerve

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Pectoralis minor
(actions, insertion, innervation)

protracts and depresses scapula
inserts: coracoid process of scapula
innervation: medial pectoral nerve

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Serratus anterior
(actions, insertion, innervation)

protracts and superiorly rotates scapula; stabilizes scapula
inserts: anterior medial border of scapula
innervation: long thoracic nerve

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Subclavius
(actions, innervation)

stabilizes and depresses clavicle
innervation: nerve to subclavius

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Latissimus dorsi
(actions, insertion, innervation)

extends, adducts, medial rotates GH joint
insert: intertubercular groove of humerus
innervation: thoracodorsal nerve

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Pectoralis major
(actions, insertion, innervation)

arm flexion; adduct and medially rotate GH joint
insert: intertubercular groove of humerus
innervation: lateral pectoral and medial pectoral nerves

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deltoid
(actions, insertion, innervation)

anterior fibers: flex and medially rotate GH joint
middle fibers: GH abduction
posterior fibers: extend and laterally rotates GH joint
insert: deltoid tuberosity of humerus
innervation: axillary nerve

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coracobrachialis
(actions, origin, insertion, innervation)

adduct and flexes GH joint
origin: coracoid process
insert: middle medial shaft of humerus
innervation: musculocutaneous nerve

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teres major
(actions, origin, insertion, innervation)

extend, adduct, medially rotate GH joint
origin: inferior lateral border and inferior angle of scapula
insert: lesser tubercle and intertubercular groove of humerus
innervation: lower subscapular nerve

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triceps brachii
(actions, origin, insertion, innervation)

extends GH joint
origin: infraglenoid tubercle
inserts: olecranon process
innervation: radial nerve

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biceps brachii
(actions, origin, insertion, innervation)

flexes GH joint
origin: supraglenoid tubercle
insert: radial tuberosity and bicipital aponeurosis
innervation: musculocutaneous

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Subscapularis
(actions, origin, insertion, innervation)

medially rotates GH joint, stabilizes GH joint
origin: subscapular fossa
insert: lesser tubercle of humerus
innervation: upper and lower subscapular nerve

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Supraspinatus
(actions, origin, insertion, innervation)

abducts GH joint, stabilizes GH joint
origin: supraspinous fossa
insert: greater tubercle of humerus
innervation: suprascapular nerve

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infraspinatus
(actions, origin, insertion, innervation)

adduct and laterally rotate GH joint, stabilize GH joint
origin: infraspinous fossa
insert: greater tubercle of humerus
innervation: suprascapular nerve

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Teres minor
(actions, origin, insertion, innervation)

adducts and laterally rotates GH joint, stabilizes GH joint
origin: superior lateral border of scapula
insert: greater tubercle of humerus
innervation: axillary nerve

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Biceps brachii
(actions, origin, insertion, innervation)

flex elbow, supinate forearm, long head flexes GH joint
origin: long head - supraglenoid tubercle of scapula, short head - coracoid process of scapula
insert: radial tuberosity and bicipital aponeurosis
innervation: musculocutaneous nerve

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brachialis
(actions, innervation)

primary flexor of elbow
innervation: musculocutaneous

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brachioradialis
(actions, insertion, innervation)

flexes elbow
insert: styloid process of radius
innervation: radial nerve

triceps brachii
(actions, origin, insertion, innervation)

extend elbow, long head extends GH joint
origin: long head - infraglenoid tubercle of scapula
insert: olecranon process of ulna
innervation: radial nerve

pronator teres
(actions, origin, innervation)

pronates forearm
origin: medial epicondyle of humerus
innervation: median nerve

palmaris longus
(actions, origin, innervation)

wrist flexor
origin: medial epicondyle of humerus
innervation: median nerve

flexor carpi radialis (actions, origin, innervation)

flexes wrist and abducts hand origin: medial epicondyle of humerus innervation: median nerve

flexor carpi ulnaris (actions, origin, innervation)

flex wrist and adduct hand origin: medial epicondyle of humerus innervation: ulnar nerve

flexor digitorum superficialis (actions, origin, insertion, innervation)

flexes wrist, 2-5 MP joints, PIP joints origin: medial epicondyle of humerus insert: middle phalanges 2-5 innervation: median nerve

flexor pollicis longus (actions, insertion, innervation)

flex MP joint of thumb, IP joint of thumb insert: distal phalanx of thumb innervation: median nerve

flexor digitorum profundus (actions, insertion, innervation)

flexes wrist, 2-5 MP joint, PIP joints, DIP joints insert: distal phalanges 2-5 lateral 1/2 - median nerve medial 1/2 - ulnar nerve

pronator quadratus (actions, innervation)

pronates forearm innervation: median nerve

extensor carpi radialis longus (actions, innervation)

extend wrist, abduct hand innervation: radial

extensor carpi radialis brevis (actions, origin, innervation)

extend wrist, abduct hand origin: lateral epicondyle of humerus innervation: radial nerve

extensor digitorum (actions, origin, insert, innervation)

extend wrist, 2-5 MP joints, PIP joints, DIP joints origin: lateral epicondyle of humerus insert: 2-5 digits innervation: radial nerve

extensor digiti minimi (actions, origin, insertion, innervation)

extend wrist, MP, POP joints of finger 5 origin: lateral epicondyle of humerus insert: finger 5 innervation: radial nerve

extensor carpi ulnaris (actions, origin, innervation)

extend wrist, adduct hand origin: lateral epicondyle of humerus innervation: radial nerve

abductor pollicis longus (actions, innervation)

abduct thumb innervation: radial nerve

extensor pollicis brevis (actions, insertion, innervation)

extend MP joint of thumb insert: thumb innervation: radial nerve

extensor pollicis longus (actions, insertion, innervation)

extend MP and IP joints of thumb insert: thumb innervation: radial nerve

extensor indicis (actions, insertion, innervation)

extend MP, PIP, and DIP joints of finger 2 insert: 2nd finger innervation: radial nerve

supinator (actions, origin, innervation)

supinates forearm origin: lateral epicondyle of humerus innervation: radial nerve

Flexor pollicis brevis (actions, innervation)

flex thumb median nerve

abductor pollicis brevis (actions, innervation)

abducts thumb median nerve

opponens pollicis (actions, innervation)

opposes thumb median nerve

flexor digiti minimi brevis (actions, innervation)

flexes finger 5 ulnar nerve

abductor digiti minimi (actions, innervation)

abducts finger 5 ulnar nerve

opponens digiti minimi (actions, innervation)

opposes finger 5 ulnar nerve

lumbricals (actions, innervation)

flex 2-5 MP joint, extend 2-5 PIP and DIP joints lateral 2: median nerve medial 2: ulnar nerve

dorsal interossei (actions, innervation)

abducts fingers 2-5 ulnar nerve

palmar interossei (actions, innervation)

adducts fingers 2-5 ulnar nerve

adductor pollicis (actions, innervation)

adduct thumb ulnar nerve