Mutsuaki Edama1,2, Tomoya Takabayashi3, Takuma Inai3, Takanori Kikumoto3, Wataru Ito3, Emi Nakamura3, Ryo Hirabayashi3, Masahiro Ikezu3, Fumiya Kaneko3, Ikuo Kageyama4. 1. Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, kita-ku, Niigata, 950-3198, Japan. edama@nuhw.ac.jp. 2. Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan. edama@nuhw.ac.jp. 3. Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, kita-ku, Niigata, 950-3198, Japan. 4. Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan.
Abstract
PURPOSE: The aim was to clarify the effect of differences in the number of fiber bundles of the anterior tibial ligament (ATFL) on ankle braking function. METHODS: The study sample included 81Japanese cadavers. ATFLs were categorized as: Type I with one fiber bundle; Type II with two fiber bundles that were completely separated; and Type III with three fiber bundles. Three-dimensional reconstructions of a single specimen from each category were then created. These were used to simulate and calculate ATFL strain during dorsiflexion (20°) and plantarflexion (30°) on the talocrural joint axis and inversion (20°) on the subtalar joint axis. RESULTS: Almost all types of superior fiber lines were stretched with dorsiflexion and plantarflexion. Regardless of Type, the inferior fiber line was shortened with plantarflexion and stretched with dorsiflexion. The inferior fiber bundle of Type III was shortened only at plantarflexion 30° and inversion 20°, but in all others it was stretched. CONCLUSIONS: The results suggest that Type III was weaker than Type I and Type II in terms of ankle plantarflexion and inversion braking function.
PURPOSE: The aim was to clarify the effect of differences in the number of fiber bundles of the anterior tibial ligament (ATFL) on ankle braking function. METHODS: The study sample included 81Japanese cadavers. ATFLs were categorized as: Type I with one fiber bundle; Type II with two fiber bundles that were completely separated; and Type III with three fiber bundles. Three-dimensional reconstructions of a single specimen from each category were then created. These were used to simulate and calculate ATFL strain during dorsiflexion (20°) and plantarflexion (30°) on the talocrural joint axis and inversion (20°) on the subtalar joint axis. RESULTS: Almost all types of superior fiber lines were stretched with dorsiflexion and plantarflexion. Regardless of Type, the inferior fiber line was shortened with plantarflexion and stretched with dorsiflexion. The inferior fiber bundle of Type III was shortened only at plantarflexion 30° and inversion 20°, but in all others it was stretched. CONCLUSIONS: The results suggest that Type III was weaker than Type I and Type II in terms of ankle plantarflexion and inversion braking function.
Authors: Masahiro Ikezu; Mutsuaki Edama; Takuma Inai; Kanta Matsuzawa; Fumiya Kaneko; Ryo Hirabayashi; Ikuo Kageyama Journal: Int J Environ Res Public Health Date: 2021-02-18 Impact factor: 3.390