Medial epicondyle fracture causes injury to the ulnar nerve. In ulnar nerve palsy only following muscles of 3rd & 4th fingers are paralysed:-i) Palmar & Dorsal interossei ii) 3rd & 4th lumbricals iii) Hypothenar musclesHowever, extensors of these two fingers are not paralysed which are supplied by the radial nerve.About other optionsThe weakness of ulnar deviation & flexion is due to paralysis of FCU and medial half of FDP. There atrophy of hypothenar eminence and sensory loss over the hypothenar area.