Wrist and hand » Finkelsteins test
Finkelsteins test is used to diagnose De Quervain's tenosynovitis in people who have wrist pain.
The Abductor Pollicis Longus Muscle
The abductor pollicis longus muscle assists in bending the thumb, and with it the wrist outward when the palm faces forward. It arises a little above mid shaft along the back of the radius and the interosseous membrane to merge into a tendon that inserts on the base of the first metacarpal, the bone that forms the base of the thumb.
The Extensor Pollicis Brevis Muscle
The extensor pollicis brevis muscle both extends the thumb and assists in bending the wrist outward. It arises on the back side of the radius and the interosseous membrane, wraps around to the inside of the radius, and courses downward as a tendon to insert at the base of the first phalanx of the thumb.
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