Muscle | Orgin | Insertion | Action |
Pronator Teres | Humeral Head: med. supracondylar ridge & med. epicaondyle of humerus | Middle of lat. surface of radius | Pronates & flexes forearm |
Flexor Carpi Radialis | med. epicondyle of humerus through common tendon | front of the bases of 2nd & 3rd metacarpal | Flexes hand. synergist in abduction w/ extensor carpi radialis & brevis |
Palmaris Longus | Med. epicaonyle of humerus through common tendon | Front of flexor retinaculum & apex of palmar aponeurosis | Flexes hand |
Flexor Carpi Ulnaris | Humeral: med. epicondyle of humerus through the common tendon. Ulnar: med. margin of olecranon process of ulna, dorsal baorde of shaft of ulna | Pisiform bone, hook of hamate, & base of 5th metacarpal bone | Flexes hand, synergist in adduction of hand w/ extensor carpi ulnaris |
Flexor digitorum Superficialis | Humeroulnar: med. epicondyle of humerus through common tendon, med. margin of coronaid process of ulna. Radial: ant. surface of shaft of radius | 4 tendons divided & inserted in the middle phalanges of 4 fingers | Flexes the middle phalanges of fingers |
Flexor Digitorum Profundus | Upper 3/4 of ant. & med. surfaces of shaft of ulna & med. side of coronoid process, interosseous memebrane | Front of base of distal phalanges | flexes distal phalanges |
Flexor Pollicis Longus | middle of ant. surface of shaft of radius, interosseous membrane, med. epiconyle of humerus & often couranoid process of ulna | palmar aspect of base of dista phalanx of thumb | flexes the thumb |
Pronator Quadratus | Ant. surface of distal part of shaft of ulna | lower portion of ant. surface of shaft of radius,distal part of lat. bdr. of radius | pronated forearm&hand |
Brachioradialis | upper 2/3 of lat. supracondylar ridge of humerus | base of styloid process& lat. surface of radius | flexes forearm |
Extensor Carpi Radialis Longus | lower 3rd of lat. supracondylar ridge of humerus | dorsal surface of base of 2nd metacarpal | extends hand,synergist in abduction of hand w/flexor carpi radialis |
Extensor Carpi Radialis Brevis | Lat. epiconyle of humerus | dorsal surface of 3rd metacarpal bone | extends hand, synergist in abduction of hand w/ flexor carpi radialis |
Extensor Digitorum Communix | common tendon attsached to lat. epiconyle of humerus | Lat. & dorsa surfaces of all phalangeds of 4 fingers | estends the fingers & wrist |
Extensor Digiti Minimi | common tendon attached to lat. epiconyle of humerus | Dorsal surface of base of 1st phalanx of 5th finger | extends 5the finger |
Extensor Carpi Ulnaris | common tendon attaced to Lat. epicondyle of humerus | dorsal surface of base of 5th metacoarpal bone | extendss hand, synergist in adduction of hand w/flexor carpi ulnaris |
Supinator | lat. epicnyle of humerus, lat. lig. of elbow, annular lig. of sup. radioulnar joint, supinator crest of ulna | Dorsal & lat. surfaces of upper 3rd of radius | supinates forearm |
Abductor Pollicis Longus | post. surface of shaft of radius, ulna, interosseous membrane | Dorsal surfaces of base of 1st metacarpal bone | abduts, lat. rotates, & extends thumb; abducts wrist |
Extensor Pollicis Brevis | dorsal surface of radius, adjacen part of interosseous membrane | base of proximal phalanx of thumb | extends thumb,abducts hand |