The insertion of the extensor digitorum tendon on the proximal phalanx
The insertion of the extensor digitorum tendon on the proximal phalanx
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DOI：
10.1016/s0363-5023(96)80156-0
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发表时间：
1996-01-01
影响因子：
1.9
通讯作者：
Vico, L
中科院分区：
文献类型：
--
作者：
Jan, SV;Rooze, M;Vico, L
回顾文献表明，指伸肌肌腱与近端指骨和掌指关节囊之间的关系尚不清楚。本研究提供了这些关系的数据，包括三个部分：区域解剖、高梯度磁共振成像和功能研究。总共使用了50只手。30只手进行解剖，10只手进行磁共振检查，其余10只手进行功能分析。解剖未发现指伸肌腱在近端指骨基部的插入。在8只手上观察到掌指关节囊背侧向伸肌腱掌侧近端延伸。在剩下的22只手上，关节囊和肌腱之间只发现了松散的结缔组织。这种组织的发育是多变的。使用7T磁共振装置对这些观测结果进行了关联。功能研究结果显示，在切除伸肌腱下的掌指骨结构后，近端指骨过伸增加。综上所述，在近端指骨基底上没有发现真正的指伸肌腱止点。在掌指关节囊和掌侧肌腱之间观察到松散的结缔组织，这似乎在近端指骨的伸展中起次要作用。
Review of the literature reveals that the relationship between the extensor digitorum muscle tendon to the proximal phalanx and the metacarpophalangeal joint capsule remains unclear. The present study presents data about these relationships and consists of three parts: dissection of the region, high-gradient magnetic resonance imaging, and functional study. A total of 50 hands were used. Dissection was performed on 30, magnetic resonance studies were performed on 10, and the remaining 10 hands were used for the functional analysis. Dissection did not reveal an insertion of the extensor digitorum tendon on the base of the proximal phalanx. An extension of the dorsal part of the metacarpophalangeal joint capsule running proximally toward the palmar side of the extensor tendon was observed in eight hands. In the remaining 22 hands, only loose connective tissue was found between the articular capsule and the tendon. The development of this tissue was variable. These observations were correlated using a 7T magnetic resonance installation. The results of the functional study showed that hyperextension of the proximal phalanx increased after resection of the metacarpophalangeal structures lying under the extensor tendon. In conclusion, no real tendinous insertion of the extensor digitorum tendon on the base of the proximal phalanx could be found. Loose connective tissue was observed between the metacarpophalangeal joint capsule and the palmar aspect of the tendon, which seemed to play a secondary role in the extension of the proximal phalanx.