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Origins/insertions

muscles of the arms, hands, and fingers

TermDefinition
Pectoralis major O: medial half of clavicle sternum cartilages of upper 6 ribs aponeurosis of external oblique I: lateral lip of bicipital groove of humerus
Triceps brachii O: infraglenoid tubercle of scapula posterior humerus above spiral groove posterior humerus below spiral groove I: olecranon process of ulna
Brachialis O: lower half of anterior shaft of humerus I: tuberosity of ulna coronoid process of ulna
Supinator O: lateral epicondyle of humerus annular ligament of radius radial collateral ligament proximal ulna at supinator crest I: lateral surface of proximal 1/3 radius between anterior and posterior oblique lines
Pronator quadratus O: distal fourth of anterior ulna I: distal fourth of anterior radius
Pronator teres O: medial epicondyle of humerus coronoid process of ulna I: middle of lateral shaft of radius
Abductor pollicis longus O: posterior radius posterior ulna interosseous membrane I: base of 1st metacarpal
Anconeus O: lateral epicondyle of humerus I: olecranon process upper posterior surface of ulna
Extensor indicis O: posterior ulna interosseous membrane I: extensor expansion of index finger
Extensor carpi ulnaris O: lateral epicondyle of humerus posterior proximal ulna I: base of 5th metacarpal
Extensor carpi radialis longus O: lateral supracondylar ridge of humerus lateral epicondyle of humerus I: base of 2nd metacarpal
Extensor carpi radialis brevis O: lateral epicondyle of humerus I: base of 3rd metacarpal
Extensor digitorum O: lateral epicondyle of the humerus I: extensor expansion of four fingers
Extensor digiti minimi O: lateral epicondyle of humerus I: extensor expansion of pinky
Brachioradialis O: lateral supracondylar ridge of humerus I: styloid process of radius
Flexor digitorum profundus O: proximal 3/4 anterior ulna I: interosseous membrane
Flexor carpi radialis O: medial epicondyle of humerus I: bases of 2nd and 3rd metacarpals
Flexor carpi ulnaris O: medial epicondyle of humerus proximal posterior ulna olecranon process of ulna I: pisiform carpal bone hamate carpal bone base of 5th metacarpal
Palmaris longus O: medial epicondyle of humerus I: palmar aponeurosis flexor retinaculum
Flexor pollicus longus O: middle of anterior radius interosseous membrane I: distal phalanx of thumb
Flexor pollicus brevis O: flexor retinaculum trapezium carpal bone trapezoid carpal bone capitate carpal bone I: base of proximal phalanx of thumb (radial side)
Adductor pollicis O: anterior shaft of 3rd metacarpal base of 2nd and 3rd metacarpals capitate carpal bone trapezoid carpal bone trapezium carpal bone I: base of proximal phalanx of thumb (medial side)
Opponens pollicis O: flexor retinaculum trapezium carpal bone I: lateral shaft of 1st metacarpal
Abductor pollicus brevis O: flexor retinaculum trapezium carpal bone scaphoid carpal bone I: base of proximal phalanx of thumb (radial side)
Abductor digiti minimi O: pisiform carpal bone I: base of proximal phalanx of pinky (ulnar side)
Flexor digiti minimi brevis O: flexor retinaculum hook of hamate carpal bone I: base of proximal phalanx of pinky
Opponens digiti minimi O: flexor retinaculum hook of hamate carpal bone I: ulnar border of 5th metacarpal
Flexor digitorum superficialis O: medial epicondyle of humerus coronoid process of ulna anterior oblique line of radius I: sides of shafts of middle phalanges of four fingers
Lumbricals O: flexor digitorum profundus tendons I: extensor expansion of four fingers at proximal phalanges
Dorsal interossei O: adjacent dorsal surfaces of metacarpals I: base of proximal phalanges of three middle fingers
Created by: Meerkatmec1
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