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elbow flexors and supinators
biceps brachii
brachialis
brachioradialis
supinator
elbow extensors and pronators
triceps brachii
anconeus
pronator teres/quadratus
Anconeus orgin
Posterior surface of the lateral condyle of the humerus
aconeus insertion
Lateral border of the olecranon process
aconeus action
extension of the elbow
Stabilization of ulna during pronation/supination
aconeus innervation
radial nerve, C7-C8
biceps brachii origin
short head: coracoid process of scapula
long head: supraglenoid tubercle of scapula
biceps brachii insertion
radial tuberosity
biceps brachii action
flexes elbow and shoulder; supinates forearm
biceps brachii innervation
Musculocutaneous nerve (C5, C6)
brachialis origin
Distal half of anterior surface of humerus
brachialis insertion
coronoid process and ulnar tuberosity
brachialis innervation
Musculocutaneous nerve (C5, C6)
brachialis action
flexes forearm
brachioradialis origin
lateral supracondylar ridge of humerus
brachioradialis insertion
radial styloid process
brachioradialis action
flexes forearm, forearm pronation
brachioradialis innervation
Radial nerve (C5, C6, C7)
extensor carpi radialis brevis origin
Lateral epicondyle via the common extensor tendon
Radial collateral ligament
extensor carpi radialis brevis insertion
base of 3rd metacarpal
extensor carpi radialis brevis action
wrist extension, radial deviation
extensor carpi radialis brevis innervation
radial nerve, C6-C7
extensor carpi radialis longus origin
lateral supracondylar ridge of humerus
extensor carpi radialis longus insertion
Radial side of the 2nd metacarpal
extensor carpi radialis longus action
extends and abducts wrist
extensor carpi radialis longus innervation
Radial nerve (C6, C7)
extensor carpi ulnaris origin
lateral epicondyle of humerus
extensor carpi ulnaris insertion
ulnar side of the base of the 5th metacarpal
extensor carpi ulnaris action
wrist extension, ulnar deviation
extensor carpi ulnaris innervation
Deep radial nerve (C6-C8)
extensor digitorum communis origin
lateral epicondyle of humerus
extensor digitorium communis insertion
Into the dorsal surface of the base of the middle and distal phalanges of each of the four fingers
extensor digitorium communis action
Wrist extension, MCP/PIP extension
extensor digitorum communis innervation
deep radial
flexor carpi radialis origin
medial epicondyle of humerus
flexor carpi radialis insertion
Palmar aspect of the bases of the 2nd and 3rd metacarpal bones
flexor carpi radialis action
Forearm pronation, Wrist flexion, Radial deviation and Elbow flexion
flexor carpi radialis innervation
Median nerve (C6, C7)
flexor carpi ulnaris origin
Humeral head: Medial epicondyle via the common flexor tendon
Ulnar head: Medial border of the olecranon; proximal two-thirds of the posterior ulna
flexor carpi ulnaris insertion
pisiform, hamate, 5th metacarpal
flexor carpi ulnaris action
wrist flexion, ulnar deviation, elbow flexion
supinator orgin
lateral epicondyle of humerus, RCL, crest of ulna
supinator insertion
proximal 1/3 of radius
supinator action
supinates forearm
supinator innervation
deep branch of radial nerve
triceps brachii orgin
Long head: Infraglenoid tuberosity of the scapula
Lateral head: Posterolateral surface of the proximal one-half of the humeral shaft
Medial head: Posteromedial surface of the humerus
triceps brachii insertion
olecranon process of ulna
triceps brachii action
extends forearm and shoulder extension
triceps brachii innervation
Radial nerve (C6, C7, C8)
pronator teres origin
medial epicondyle of humerus and coronoid process of ulna
pronator teres insertion
middle of lateral surface of radius
pronator teres action
pronates and flexes forearm
pronator teres innervation
Median nerve (C6, C7)
pronator quadratus origin
Distal 1/4 of anterior surface of ulna
pronator quadratus insertion
Lateral, anterior surface of distal radius
pronator quadratus action
pronates forearm
pronator quadratus innervation
anterior interosseous nerve (C8, T1)
palmaris longus origin
medial epicondyle of humerus
palmaris longus insertion
flexor retinaculum and palmar aponeurosis
palmaris longus action
flexes wrist
palmaris longus innervation
Median nerve (C6, C7)
flexor digitorium profundus orgin
Anteromedial proximal three-fourths of the ulna and associated interosseous membrane
flexor digitorum profundus insertion
bases of distal phalanges of digits 2-5
flexor digitorum profundus action
DIP flexion
PIP flexion
Wrist flexion
flexor digitorum profundus innervation
Lateral: Median nerve
Medial: Ulnar nerve C8-T1
flexor digitorum superficialis origin
medial epicondyle of humerus, coronoid process of ulna, anterior oblique line of radius
flexor digitorum superficialis insertion
middle phalanges of digits 2-5
flexor digitorum superficialis action
PIP flexion
MCP flexion
Wrist flexion