| Term | Definition |
|
Brachioradialis |
Origin - Middle fifth of humerus. Insertion - Styloid process of radius. Action - Spinator of hand. |
|
Extensor carpi radialis longus |
Origin - Lateral supracondylar ridge. Insertion - Base of second metacarpal. Action - Extends hand. |
|
Extensor carpi radialis brevis |
Origin - Lateral epicondyle of humerus. Insertion - Base of thrid metacarpal. Action - Extends hand. |
|
Extensor digitorum communis |
Origin - Lateral epicondyle of humerus. Insertion - Proximal phalanges of digits 2 to 5. Action - Extends digits 2 to 5. |
|
Extensor digitorum lateralis |
Origin - Lateral supracondylar ridge. Insertion - Tendons of extensor digitorum communis. Action - Extends digits 2 to 5. |
|
Extensor carpi ulnaris |
Origin - Lateral epicondyle of humerus. Insertion - Base of metacarpal 5. Action - Extends digit 5. |