The thumb is controlled by 4 long and 6 short muscles ... end of the first metacarpal bone backward and ulnarward against the second metacarpal, an adherent sheath of the extensor pollicus longus ...

wkes.eu The extensor carpi ulnaris ... ECU is a long thin muscle located on the ulnar aspect of the forearm. It arises from the lateral epicondyle of the distal humerus and inserts at the fifth ...