Yoshizuka Hisayoshi, Shibata Kentaro, Asami Toyoko, Kuraoka Akio
Department of Anatomy and Physiology, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Saga, 849-8501, Japan.
Department of Rehabilitation Medicine, Saga University Hospital, 5-1-1 Nabeshima, Saga, Saga, 849-8501, Japan.
Anat Sci Int. 2018 Sep;93(4):495-501. doi: 10.1007/s12565-018-0440-3. Epub 2018 Apr 20.
The lateral ligament complex of the ankle is involved in a large proportion of ankle sprains. The calcaneofibular ligament (CFL) is often involved in severe injuries. The purpose of this study was to evaluate the anatomical variation and laterality of the CFL to improve our understanding of the mechanisms of CFL-related injuries. This study utilized 110 paired ankles from 55 formalin-fixed Japanese cadavers (33 male and 22 female). The length and width of the CFL and the angle created by the CFL and long axis of the fibula (CF angle) were measured after exposing the CFL by careful dissection from the surrounding tissues. The results revealed that each parameter exhibited a wide range of values and showed unique patterns of frequency distribution, among which only the length was normally distributed. Among the parameters, only the CF angle showed no significant correlation with the other parameters. Analysis of laterality revealed that the mean left CF angle was significantly greater than the value on the opposite side (p < 0.05) and that the values of the bilateral CF angle showed no significant correlation at the individual level. The present results revealed not only detailed information regarding the CFL morphology, but also inter- and intra-individual laterality regarding the CFL traveling angle. It is likely that the differences in the quality and quantity of mechanical stress against each leg may have caused this morphologic laterality of the CFL.
踝关节外侧韧带复合体在很大比例的踝关节扭伤中受累。跟腓韧带（CFL）常累及严重损伤。本研究的目的是评估CFL的解剖变异和左右侧差异，以增进我们对CFL相关损伤机制的理解。本研究使用了来自55具福尔马林固定的日本尸体（33例男性和22例女性）的110对踝关节。通过仔细从周围组织中解剖暴露CFL后，测量CFL的长度和宽度以及CFL与腓骨长轴形成的角度（CF角）。结果显示，每个参数都呈现出广泛的值范围，并显示出独特的频率分布模式，其中只有长度呈正态分布。在这些参数中，只有CF角与其他参数无显著相关性。左右侧分析显示，左侧平均CF角显著大于对侧的值（p < 0.05），且双侧CF角的值在个体水平上无显著相关性。目前的结果不仅揭示了关于CFL形态的详细信息，还揭示了关于CFL走行角度的个体间和个体内左右侧差异。每条腿所承受的机械应力在质量和数量上的差异可能导致了CFL的这种形态学左右侧差异。
