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( R e d i r e c t e d f r o m F r o m e n t ' s s i g n )
Froment sign is a special test of the wrist for palsy of the ulnar nerve , specifically, the action of adductor pollicis .[1]
Process of examination
[ edit ]
To perform the test, a patient is asked to hold an object, usually a flat object such as a piece of paper, between the thumb and index finger (pinch grip). The examiner then attempts to pull the object out of the subject's hands.[2]
A normal individual will be able to maintain a hold on the object without difficulty.
However, with ulnar nerve palsy, the patient will experience difficulty maintaining a hold using the adductor pollicis. They will instead use the flexor pollicis longus of the thumb to grip the paper causing a flexion of the interphalangeal joint.[3]
Froment sign is the flexion of the interphalangeal joint of the thumb rather than adduction of the entire thumb.
Note that the flexor pollicis longus is nearly always innervated by the anterior interosseous branch of the median nerve .
Simultaneous hyperextension of the thumb MCP joint is indicative of ulnar nerve compromise. This is also known as Jeanne's sign.[2]
Eponym
[ edit ]
It is named after French neurologist Jules Froment .[4] [5]
References
[ edit ]
^ a b Jeff G. Konin et al . Special Tests for Orthopedic Examination: Third Edition. Thorofare, NJ. SLACK Incorporated, 2006.
^ Richardson, Craig and Fabre, Gerd. '"Froment's Sign." Journal of Audiovisual Media in Medicine. Vol. 26, No. 1 (2003):34.
^ synd/1970 at Who Named It?
^ Froment, J. (1915). "La préhension dans les paralysies du nerf cubital et le signe du pouce". La Presse Médicale . 23 . Paris: 409.
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e
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Froment_sign&oldid=1209664977 "
C a t e g o r i e s :
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