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Abductor pollicis brevis and extensor pollicis brevis
Abductor pollicis brevis and extensor pollicis longus
Abductor pollicis longus and extensor pollicis brevis
Abductor pollicis longus and extensor pollicis longus
Adductor pollicis and extensor pollicis longus
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Intersection syndrome is also known as "squeakers wrist," "oarsmen wrist," and crossover tendinitis. It occurs where the first and second dorsal wrist compartment structures pass over one another, resulting in fibrosis, muscular changes, and inflammation of the bursa in this area. The structures involved are the abductor pollicis longus and extensor pollicis brevis (first dorsal compartment) that pass across the second compartment structures (extensor carpi radialis brevis and extensor carpi radialis longus). An audible "squeak" is occasionally heard at the intersection point, which is approximately 4 to 5 cm proximal to the proximal dorsal wrist crease.
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