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Pronator Quadratus
- (O) Medial,Anterior surface of the distal Ulna
- (I) Lateral Anterior surface of the Distal Radius
- (A) Pronate the forearm
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Supinator
- (O) Lateral epicondyle of humerus, radial collateral ligament, annular ligament and supinator crest of the ulna
- (I) Anterior, lateral surface of the proximal 1/3rd of the radial shaft
- (A) Supinate the forearm
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Brachialis
- (O) Distal half of anterior surface of humerous
- (I) Tuberosity and coronoid process of ulna
- (A) Flex the elbow (Humeroulnar Joint)
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Brachioradialis
- (O) proximal two-thirds of the lateral supracondylar ridge of the humerous
- (I) Styloid process of radius
- (A) Flex the elbow
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Extensor carpi Radialis Longus
- (O) Distal one-third of the lateral suprachondylar ridge of the humerus
- (I) base of the second metacarpal
- (A) Extend wrist, Abduct Wrist, assist flex the elbow
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Extensor Carpi Radialis Brevis
- (O) Common extensor tendon from the lateral epicondyle of humerus
- (I) Base of the third metacarpal
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Extensor Cari Ulnaris
- (O) Common extensor tendon from the lateral epicondyle of humerus
- (I) base of the fith metacarpal
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Extensor Digitorum
- (O) Common extensor tendon from the lateral epicondyle of humerus
- (I) Bases of the middle and distal Phalages of the second through fifth fingers
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Anconeus
- (O) Lateral epicondyle of the humerus
- (I) Olecranon process and posterior, proximal surface of ulna
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Extensor Indicis
- (O) Posterior surface of distal shaft of Ulna and interosseous membrane
- (I) Tendon of the extensor digitorum at the level of the second metacarpal
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Flexor carpi Radialis
- (O) Common flexor tendon from the medial epicondyle of humerus
- (I) Bases of second and third metacarpals
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Palmaris Longus
- (O) Common flexor tendon from the medial epicondyle of humerus
- (I) Flexor retinaculum and palmar aponeurois
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Flexor Carpi Ulnaris
- (O) Humeral Head: Common flexor tendon from the medial epicondyle of humerus
- Ulnar Head: Posterior surface of proximal two thirds of ulna
- (I) Pisiform, hook of the hamate and base of the fifth metacarpal
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Flexor Digitorum Superficialis
- (O) Common flexor tendon from the medial epicondyle of humerus, ulnar collaterall ligament, coronoid process of ulna, interosseous membrane and proximal shaft of radius
- (I) Sides of middle phalanges of second through fifth fingers
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Flexor Digitorum Profundus
- (O) Anterior and medial surfaces of proximal 3/4 of ulna.
- (I) Bases of distal phalanges, palmar surface of second through fifth fingers
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Pronator Teres
- (O) Common flexor tendon from the medial epicondyle of humerus and coronoid process of the ulna
- (I) Middle of leteral Surface of radius
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