Bade H, Krolak C, Koebke J
Department of Anatomy, Institute II, University of Cologne, Federal Republic of Germany.
Anat Rec. 1995 Dec;243(4):524-30. doi: 10.1002/ar.1092430416.
The extensor apparatus of the thumb displays obvious structural variations in its proximo-distal expanse. Its associated tissue comes in close relation to the dorsal aponeurosis that have varying topographical relationships to the extensor apparatus of the thumb. This region is especially important as the location of pathological and repair processes.
In this anatomical study using a modified embedding technique a histological description of the fibrous architecture of the dorsal aponeurosis and the peritendinous connective tissue body of the thumb is presented.
The dorsal connective tissue of the thumb forms different layers of collagen lamellae as a peritendinous system around the tendons of the long and short extensor tendons of the thumb. This peritendinous laminar system as the main part of the dorsal aponeurosis is connected with both the capsular and the retinacular ligaments of the thumb.
It will be shown that the structural variations of the dorsal aponeurosis and peritendinous connective tissue are an expression of different topographical zones of stress along the lines of a balanced musculofibrous stabilization of the interphalangeal joint of the thumb. The expansions in the peritendinous intercellular space act as defined gliding spaces or clefts of the extensor apparatus.
拇指伸肌装置在其近远侧范围显示出明显的结构变异。其相关组织与背侧腱膜密切相关，背侧腱膜与拇指伸肌装置具有不同的局部解剖关系。该区域作为病理和修复过程的发生部位尤为重要。
在这项采用改良包埋技术的解剖学研究中，对拇指背侧腱膜和腱周结缔组织体的纤维结构进行了组织学描述。
拇指背侧结缔组织围绕拇指长短伸肌腱形成不同层的胶原板层，作为腱周系统。这个作为背侧腱膜主要部分的腱周板层系统与拇指的关节囊和支持带相连。
将表明，背侧腱膜和腱周结缔组织的结构变异是沿拇指指间关节肌肉纤维平衡稳定线不同局部应力区的一种表现。腱周细胞间隙的扩展充当伸肌装置的特定滑动空间或裂隙。
