Seradge H, Tian W, Baer C
The Hand Institute of Oklahoma, Orthopaedic & Reconstructive Center, Oklahoma City, USA.
Am J Orthop (Belle Mead NJ). 1999 Jul;28(7):399-401.
We found an anatomic variation of the extensor digiti minimi (EDM) and extensor digitorum communis (EDC) in a cadaveric dissection. The EDM had three tendon slips; two slips to the little finger and one to the ring finger metacarpophalangeal (MP) joint. The ring finger slip inserted in the extensor hood with the EDC. The EDC had a separate tendon to the little finger extensor hood. The EDM had an additional pulley distal to the extensor retinaculum. The MP joints of the little and ring fingers extended simultaneously upon pulling the EDM or the EDC. The third slip of the EDM could provide an extra donor site and possibly poses a unique clinical presentation.
我们在尸体解剖中发现了小指伸肌（EDM）和指总伸肌（EDC）的解剖变异。EDM有三条肌腱束；两条至小指，一条至环指掌指（MP）关节。环指的肌腱束与EDC一起插入伸肌帽。EDC有一条独立的肌腱至小指伸肌帽。EDM在伸肌支持带远侧有一个额外的滑车。牵拉EDM或EDC时，小指和环指的MP关节会同时伸展。EDM的第三条肌腱束可提供一个额外的供体部位，并可能呈现独特的临床表现。
