Dylevský I, Trnková-Hergetová E
Institute of Anatomy, 1st Medical Faculty, Charles University, Praha Czech Republic.
Funct Dev Morphol. 1994;4(2):105-8.
This paper demonstrates the structure and development of the layer of mm. flexores breves profundi in Felis catus (Carnivora). By microdissections of the deep palmar musculature, it was found that there were formed two muscle layers: 1) four muscles beginning on the palmar side of the carpus, passing distally through the intermetacarpal spaces and inserting into the dorsal digital aponeurosis of the second to fourth digit--the superficial muscle layer of mm. flexores breves profundi; 2) four muscles beginning on the palmar area of the second to fifth metacarpus and inserting into the capsules of the metacarpophalangeal joints of the second to fifth digit--the deep muscle layer of mm. flexores breves profundi. Ontogenesis of these muscle layers was studied on 35 histological series of embryonal extremities. In early ontogenesis we found a coherent cell condensate of the anlage of mm. flexores breves profundi layer. Differentiation of the anlagen of individual muscles takes place in the foetuses of 17-20 mm crown-rump length. In embryos of 17-19 mm crown-rump length a small cell condensations corresponding to the layer of mm. intermetacarpales anlagen were found in the second and third intermetacarpal spaces. Both anlagen are formed only temporarily whereafter they break into fragments and extinct.
本文展示了家猫（食肉目）中屈指短肌深层的结构和发育情况。通过对掌部深层肌肉进行显微解剖发现，形成了两层肌肉：1）四块肌肉起于腕掌侧，向远端穿过掌骨间隙，止于第二至第四指的背侧指腱膜——屈指短肌深层的浅层肌肉层；2）四块肌肉起于第二至第五掌骨掌面，止于第二至第五指掌指关节的关节囊——屈指短肌深层的深层肌肉层。在35个胚胎肢体组织学切片系列上研究了这些肌肉层的个体发生。在个体发生早期，我们发现了屈指短肌深层原基的连贯细胞凝聚物。各肌肉原基的分化发生在顶臀长17 - 20毫米的胎儿期。在顶臀长17 - 19毫米的胚胎中，在第二和第三掌骨间隙发现了对应掌骨间肌原基层的小细胞凝聚物。这两个原基仅暂时形成，之后它们会分裂成碎片并消失。
