Muscle that can extend the middle distal phalanx of the index finger include all except
Extensor carpi radialis Origin: lower 1/3 rd of lateral supracondylar ridge of humerus Inseion: posterior surface of base of second metacarpal bone. Action: extends and abducts hand at the wrist joint.
The first dorsal inter interosseous
The first lumbrical
The second palmar interosseous
Extensor carpi radialis longus
Upper limb