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Brachialis
- A- Flex the elbow
- O- Distal half of anterior surface of humerus
- I- Tuberosity and coronoid process of ulna
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Brachioradialis
- A- Flex the elbow, assist to pronate and supinate the forearm when these movements are resisted
- O- lateral supracondylar ridge of humerus
- I- Styloid process of radius
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Extesnor Carpi Radialis Longus and Brevis
- A- Extend the wrist, abduct the wrist, assist to flex the elbow
- O- Lateral supracondylar ridge of humerus
- I- Longus: Base of second metacarpal
- Brevis- Base of third metacarpal
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Extensor Carpi Ulnaris
- A- Extend the wrist, adduct the wrist
- O- Common extensor tendon from the lateral epicondyle of humerus
- I- Base of fifth metacarpal
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Extensor Digitorum
- A- Extend the second through fifth fingers, assist to extend the wrist
- O- common extensor tendon from the lateral epicondyle of humerus
- i- middle and distal phalanges of second through fifth finger
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