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Muscle origin insertion action Pronator Teres coronoid process middle of convexity of pronate and flex arm lateral surface of the at elbow...

Muscle origin insertion action Pronator Teres coronoid process middle of convexity of pronate and flex arm lateral surface of the at elbow radius flexor carpi radialis medial epicondyle of base of 2nd flexes hand and the humerus metacarpal abducts palmaris longus medial epicondyle of distal half of flexor flexes hand and humerus retinaculum and tenses palmer palmer aponeurosis aponeurosis flexor carpi ulnaris medial epicondyle pisiform/ hook of flex and adduct hand hamate, 5th metacarpal flexor digitorum medial epicondyle shafts of middle four flex middle phalanges superficialis phalanges of medial at proximal 4 digits interphalageal joints of middle four digits. Also flexes proximal phalanges at metacarpopahalange al joints flexor dogitorum proximal ¾ of medial bases of distal flex distal phalanges profoundus and anterior ulna and phalanges of 4th/5th Interosseus digit membrane Bases of distal phalanges of 2nd/3rd digit flexor policies longus anterior surface of base of distal phalanx flex thumb radius and of thumb interossues membrane brachioradialis proximal ⅔ of lateral lateral surface of elbow flexion hand supracondyler ridge distal end of radius neutral oh humerus proximal to styloid extensor carpi radialis lateral supracondyler dorsal aspect of base extend and abduct longus ridge of the humerus of 2nd meta carpal hand extensor carpi radialis lateral supracondyler dorsal aspect of base extend and abduct brevis ridge of the humerus of 3rd metacarpal hand extensor carpi ulnaris lateral epicondyle of dorsal aspect of the extend and adduct humerus base of the 5th hand  metacarpal extensor digitorum lateral epicondyle extensor expansion extend medial 4 digits of medial 4 digits extensor digiti minimi lateral epicondyle of extensor expansion extend pinky humerus of 5th digit supinator lateral condyle of the lateral, posterior and supinate forearm humerus anterior surface of the proximal 3rd of the radius extensor policies posterior surface of dorsal aspect of the extend thumb longus the middle third of the distal phalanx of the ulna and interosseus thumb membrane extensor policies posterior surface of dorsal aspect of extend thumb brevis the distal 3rd of the proximal phalanx of radius thimb extensor indices posterior surface of extensor expansion extend pointer finger the distal 3rd of the of second digit ulna and interosseus membrane