Rourke K, Dafydd H, Parkin I G
Department of Anatomy, University of Cambridge, Cambridge, United Kingdom.
Clin Anat. 2007 Nov;20(8):946-9. doi: 10.1002/ca.20500.
Fibularis tertius (FT) may be used during reconstructive surgery and muscle transposition with retention of function. The muscle was examined in both lower limbs of 41 cadavers. Measurements were made of muscle belly length and width, tendon length and width, and the size of the origin on the fibula. Tendon insertion, nerve and blood supplies were also examined. FT was absent in five (6.1%) lower limbs of three (7.3%) subjects. The size of its origin demonstrated inter- and intra-individual variation. FT arose from the distal fibula and on average occupied (28.4 +/- 9.1)% (mean +/- S. D.) of the total shaft length. In all cases the tendon inserted into the dorsal surface of the shafts of both the fourth and fifth metatarsals. A small nerve branch consistently arose from the deep fibular nerve near the origin of extensor digitorum longus. The nerve ran parallel to the length of this muscle, between it and extensor hallucis longus, before piercing FT. Anatomy textbooks describe FT as inserting into the fifth metatarsal only. This study, supported by data from previous reports, suggests that the "textbook" accounts of FT should be updated to record that most commonly its tendon reaches both the fourth and fifth metatarsals.
第三腓骨肌（FT）可在保留功能的重建手术和肌肉转位中使用。对41具尸体的双下肢进行了该肌肉的检查。测量了肌腹的长度和宽度、肌腱的长度和宽度以及在腓骨上的起点大小。还检查了肌腱附着点、神经和血液供应情况。在3名（7.3%）受试者的5条（6.1%）下肢中未发现第三腓骨肌。其起点大小存在个体间和个体内差异。第三腓骨肌起自腓骨远端，平均占腓骨干总长度的（28.4±9.1）%（平均值±标准差）。在所有病例中，肌腱均附着于第四和第五跖骨骨干的背侧。一条小神经分支始终发自趾长伸肌起点附近的腓深神经。该神经在穿过第三腓骨肌之前，在其与拇长伸肌之间沿该肌肉的长度方向平行走行。解剖学教科书描述第三腓骨肌仅附着于第五跖骨。本研究以及先前报告的数据均表明，关于第三腓骨肌的“教科书”描述应更新，以记录其肌腱最常见的附着情况是同时到达第四和第五跖骨。
