Muscle that can extend the middle distal phalanx of the index finger include all except: (A) The first dorsal inter interosseous, (B) The first lumbrical, (C) The second palmar interosseous, (D) Extensor carpi radialis longus
Answer is D. 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.