forearm - moina

pronator teres

origin: humeral head - medial epicondyle of humerus
ulnar head - medial border of coronoid process of ulna
insertion: lateral aspect of shaft of radius
nerve supply: median nerve
action: pronates and flexes the forearm

flexor carpi radialis

origin: medial epicondyle of humerus
insertion: bases of the 2nd and 3rd metacarpal bones
nerve supply: median nerve
action: flexes and abducts hand at wrist joint

palmaris longus

origin: medial epicondyle of humerus
insertion: flexor retinaculum and palmar aponeurosis
nerve supply: median nerve
action: flexes hand

flexor carpi ulnaris

origin: humeral head - medial epicondyle of humerus
ulnar head - medial aspect of olecranon process and posterior border of ulna
insertion: pisiform, hook of hamate, base at 5th metacarpal
nerve supply: ulnar nerve
action: flexes and adducts hand at wrist joint

flexor digitorum superficialis

origin: humeroulnar head - medial epicondyle of humerus, medial border of coronoid process of ulna
radial head - oblique line on anterior surface of shaft of radius
insertion: middle phalanges of the medial four fingers
nerve supply: median nerve
action: flexes middle phalanx and assists in flexing the proximal phalanx and hand

flexor pollicis longus

origin: anterior surface of the shaft of radius
insertion: distal phalanx of thumb
nerve supply: anterior interosseous branch of median nerve
action: flexes distal phalanx of thumb

flexor digitorum profundus

origin: anteromedial surface of the shaft of ulna
insertion: distal phalanges of the medial four fingers
nerve supply: ulnar and median nerve
action: flexes distal phalanges and assists flexion of middle and proximal phalanges and hand

pronator quadratus

origin: anterior surface of shaft of ulna
insertion: anterior surface of shaft of radius
nerve supply: anterior interosseous branch of median nerve
action: pronates forearm

brachioradialis

origin: lateral supracondylar ridge of humerus
insertion: base of styloid process of radius
nerve supply: radial nerve
action: flexes forearm and rotates it to a midprone position

extensor carpi radialis longus

origin: lateral supracondylar ridge of humerus
insertion: posterior surface of the base of the 2nd metacarpal
nerve supply: radial nerve
action: extends and abducts hand at wrist joint

extensor carpi radialis brevis

origin: lateral epicondyle of humerus
insertion: posterior surface of the base of the 3rd metacarpal
nerve supply: deep branch of radial nerve
action: extends and abducts hand at wrist joint

extensor digitorum communis

origin: lateral epicondyle of humerus
insertion: middle and distal phalanges of the medial 4 fingers
nerve supply: deep branch of radial nerve
action: extends fingers and hand

extensor digiti minimi

origin: lateral epicondyle of humerus
insertion: extensor expansion of the little finger
nerve supply: deep branch of radial nerve
action: extends metacarpophalangeal joint of the little finger

extensor carpi ulnaris

origin: lateral epicondyle of humerus
insertion: base of the 5th metacarpal bone
nerve supply: deep branch of radial nerve
action: extends and adducts hand at wrist joint

anconeus

origin: lateral epicondyle of humerus
insertion: lateral surface of olecranon process of ulna
nerve supply: radial nerve
action: extends elbow joint

supinator

origin: lateral epicondyle of humerus, anular ligament of proximal radioulnar joint, and ulna
insertion: neck and shaft of radius
nerve supply: deep branch of radial nerve
action: supination of forearm

abductor pollicis longus

origin: posterior surface of shafts of radius and ulna
insertion: base of the 1st metacarpal bone
nerve supply: deep branch of radial nerve
action: abducts and extends thumb

extensor pollicis brevis

origin: posterior surface of shaft of radius
insertion: base of proximal phalanx of the thumb
nerve supply: deep branch of radial nerve
action: extends metacarpophalangeal joint of the thumb

extensor pollicis longus

origin: posterior surface of shaft of ulna
insertion: base of distal phalanx of thumb
nerve supply: deep branch of radial nerve
action: extends distal phalanx of thumb

extensor indicis

origin: posterior surface of shaft of ulna
insertion: extensor expansion of index finger
nerve supply: deep branch of radial nerve
action: extends metacarpophalangeal joint of index finger