– See: – Discussion: – if the laceration occurs proximal to the junctura the diagnosis of an extensor tendon laceration can be missed; – have the patient extend the affected proximal phalanx w/ the remaining digits flexed; – lacerations of middle or little digits proximal to … Read more
– Anatomy: – transports APL & EPB tendons; – these tendons represent the radial border of the anatomic snuff box; – when pts thumb is extended, you can distinguish between the tendons as they exit the tunnel; – near insertions of tendons, distal to the tunnel, … Read more
– See: – Rupture of the Quadriceps – Patellar Tendon Injury – Tibial Tubercle Frx – Discussion: – extensor mechanism includes quadriceps, quadriceps tendon, medial & lateral retinaculum, patellofemoral and patellotibial ligaments, Patellar Tendon (ligament), and tibial tubercle; – superficial location of extensor mechanism make it suseptable to injury; … Read more
– See: Extensor Tendon Lacerations: – the extensor apparatus is a “plexus of tendons with an aponeurotic sheet.” – from Stack, 1962. MP Joint Level: – extensor digitorum communis: (at the MP joint) – there may be some adhesion to the joint capsule, but there is … Read more
– Anatomy: – extensor tunnel I – origin: – posterior side at the distal end of the body of both the ulna and radius near their middle; – insertion: – posterior surface of the base of the proximal phalanx of thumb; … Read more
– See: Extensor Pollicis Longus Rupture: – Anatomy: – origin: posterior surface of the middle 1/3 of the ulna & interosseous membrane; – insertion: posterior surface of the base of the distal phalanx of thumb; – action: extends the distal phalanx of the thumb; continued action, extends proximal phalanx and adducts the … Read more
– See: Extensor Tendon Rupture in RA – Discussion: – this tendon is prone to rupture from synovitis and increases friction at Lister’s tubercle second to diseases such as RA and Lupus; – EPL is tendon that is most frequently ruptured from distal radius frx; – if … Read more
– See: – Extensor Tendon Rupture – Extensor Digitorum Communis – Extensor Mechanism of Digits – Anatomy of EDC: – note that EDC is less tolerant of shortening than FDS due to differential in tendon excursion (50 mm compared to 70 mm, respectively); – references: – The terminal tendon … Read more
– Anatomy: Origin: the forepart of the supralateral surface of the Calcaneus;lateral talocalcaneal ligament and cruciate crural ligament; Insertion: braches into 3 tendons that insert into the lateral sides of the tendons of EDL of 2nd, 3rd, & 4th toes at the level of the MTP joint; Action: extends the … Read more
– See: – Forearm Extensors: – Extensor Tendon Laceration – origin: lateral epicondyle of humerus; – tunnel IV: – narrow retinaculum over dorsum of wrist forms pulley system for extensor tendons; – above the wrist its four slips spread out joined together by juncturae; … Read more