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Ulnar Nerve Palsy/ Claw Hand

EXAMINATION
         •CLAW HAND
           WEAKNESS          •Hypothenar eminence
                                          •Abductor digiti minimi
                                          •Median 2 lumbricals (finger flexion)
                                          •All interrossei (adduction & abduction)
           WASTING              •Medial side of forearm
           SENSORY             •Medial 1 1/2 fingers
           SYMPATHETIC     •Sweating

CAUSES
         •# Dislocation @ elbow
         •Occupational (leaning on elbows)
         •OA
         •Mononeuritis multiplex

Fig 1: Claw Hand



Fig 2: Abductor Digiti Minimi Muscle

Fig 3: Lumbricals of Hand

LATIN:  Musculi Lumbricales Manus
ORIGIN: Flexor Digitorum Profundus
NERVE: 3rd and 4th deep branch of ulnar nerve, 1st and 2nd median nerve
AACTIONS: Flex metacarpophalangeal joints, Extend interphalangeal joints


Fig 4: Palmar Interossei of Hand
Fig 5: Dorsal Interossei of Hand
 Further Reading


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