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Orthopaedics
In high lesions of ulnar nerve like elbow fractures or dislocations the degree of clawing is markedly less than in low ulnar lesions this is called ULNAR PARADOX and is due to:
The fact that the ulnar half of the FDP is paralyzed and hence there is no flexion at the IP joints.
The lumbricalis are spared and hence there is no clawing
The Median nerve compensates for the ulnar nerve
The interossei increase their tone and extend the IP joint
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