Ulnar deviation
Under the ulnar deviation is defined as a abduction of the fingers towards the outside of the hand (lat. Ulnar , of ulna " Elle " - the outer bone of the forearm ). It is one of the inflammatory joint changes and is characteristic of rheumatoid arthritis .
Loosening of the ligaments leads to a displacement of the carpal bones and a radial deviation of the metacarpal bones. To compensate for this joint position, the fingers move outwards. The articular surfaces of the metatarsophalangeal joints shift ( subluxation ), which in turn favors the gooseneck deformity .
An ulnar deviation splint or AUD brace can be worn to relieve the joints and muscles. It holds the metacarpophalangeal joints in their normal position and thus improves the grip function.
Ulnar deviation is one of the cardinal symptoms of rheumatoid arthritis .
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- Birgit Schröder: hand therapy . Thieme, 2008, ISBN 978-3-13-117642-4 , pp. 190 ff.