Injury to medial epicondyle damages ulnar nerve - Paralysis of flexor carpi ulnaris (loss of ulnar detion) Medial half of flexor digitorum profundus (loss of DIP flexion) Hypothenar muscle paralysis (and atrophy) and Sensory loss on the hypothenar eminence. Flexor digitorum superficialis (supplied by median nerve for finger flexion) and extensor digitorum (supplied by radial nerve for finger extension) are still functional.