Abductor Pollicis Longus - Everything You Need To Know - Dr. Nabil Ebraheim скачать в хорошем качестве

Abductor Pollicis Longus - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the anatomy of the Abductor Pollicis Longus. The abductor pollicis longus (APL) is an important muscle. It is one of the extrinsic muscles of the hand. Origin: it arises from the posterior surface of the ulnar radius and the interosseous membrane. Insertion: the abductor pollicis longus is inserted into the base of the first metacarpal bone. Function: the abductor pollicis longus abducts and extends the thumb at the carpometacarpal (CMC) joint. Innervation: the abductor pollicis longus is innervated by the posterior interosseous nerve. De Quervain’s Syndrome: both the abductor pollicis longus and the extensor pollicis brevis are involved in De Quervain’s syndrome. It may occur in: •Women •Golfers •Racquet sports •It may occur without any specific cause •May occur due to overuse •May occur postpartum The patient will have radial sided wrist pain. Finkelstein’s test is used to diagnose De Quervain’s tenosynovitis in patients who have wrist pain. The Finkelstein test is conducted by making a fist with the fingers closed over the thumb and the wrist is bent toward the little finger. The wrist is then pulled so that the tendons of the first dorsal compartment are stretched distally, causing sharp, local pain if tendon inflammation is present. Be aware that tenderness located over the first dorsal compartment at the level of the radial styloid process is probably De Quervain’s Syndrome. Intersection Syndrome: if the tenderness is located about 5 cm proximal to the wrist joint, then this is probably intersection syndrome. De Quervain’s Syndrome: •Stenosing inflammatory condition involving the first dorsal compartment of the wrist (involves two tendons: abductor pollicis longus and extensor pollicis brevis). •The abductor pollicis longus may have multiple slips or it may have its own separate compartment •Extensor pollicis brevis may be hidden within a separate sheath •Recurrence of symptoms may be due to a failure decompression of the tendons due to unusual anatomy. The abductor pollicis longus is also associated with Bennett Fractures. What is the deformity with a Bennett Fracture? The key is the volar ulnar beak fracture fragment attached to the palmar oblique ligament. The distal part of the first metacarpal is adducted by the adductor pollicis muscle. The metacarpal shaft is displaced proximally by the abductor pollicis longus muscle. Become a friend on facebook:   / drebraheim   Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC Donate to the University of Toledo Foundation Department of Orthopaedic Surgery Endowed Chair Fund: https://www.utfoundation.org/foundati...