Title: Froments Sign<br/>Author: Brian Corwell<br/><a href='http://umem.org/profiles/faculty/294/'>[Click to email author]</a><hr/><p>
Tests for distal ulnar nerve entrapment</p>
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Ask patient to hold a piece of paper between the thumb and the index finger</p>
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Normally this is a fairly simple task.</p>
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With an unlar nerve palsy, the patient will substitute with the FPL (flexor pollicis longus - median nerve innervation). This causes flexion of the thumb in order to maintain the grip since the adductor pollicis cannot be used. This causes thumb flexion rather than extension.</p>
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http://www.mims.com/resources/drugs/common/CP0042.gif</p>
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<a href="http://www.youtube.com/watch?v=yJTIhm1VfSI">http://www.youtube.com/watch?v=yJTIhm1VfSI</a></p>