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Extensor medii proprius muscle : ウィキペディア英語版 | Extensor medii proprius muscle
The extensor medii proprius (so called the ''extensor digiti medii'') is a rare anatomical variant in the extensor compartment of the forearm. The aberrant muscle is analogous to the extensor indicis with the insertion being the middle finger instead of the index finger. == Structure == The extensor medii proprius originates from the distal third of ulna near the extensor indicis and the adjacent interosseous membrane. It passes through the fourth extensor compartment along with the extensor indicis and the extensor digitorum. It inserts to the extensor expansion of the middle finger usually on the ulnar side of the tendon of the extensor digitorum of the middle finger, though, insertion deep to the extensor digirorum tendon was seen. Insertion to the fibrous tissue proximal to the metacarpophalangeal joint of the middle finger was also reported.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Extensor medii proprius muscle」の詳細全文を読む
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