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Ankle – Lateral
Published in A Stewart Whitley, Charles Sloane, Gail Jefferson, Ken Holmes, Craig Anderson, Clark's Pocket Handbook for Radiographers, 2016
A Stewart Whitley, Charles Sloane, Gail Jefferson, Ken Holmes, Craig Anderson
Over-and under-rotation lead to non-superimposition of the talar and trochlear surfaces.Over-rotation = fibula projected posterior to tibia.Under-rotation = shaft of fibula superimposed on tibia.Inversion injury of the ankle is common and may result in fracture of the lateral malleolus or base of the fifth metatarsal. Investigation of the injury should therefore cover both areas.
Fifth metatarsal strain distribution during cutting motions in soccer
Published in Sports Biomechanics, 2023
Yusuke Miyazaki, Rui Sugizaki, Miku Kawasaki, Takumi Nakagawa, Yasuaki Saho, Tomohiko Tateishi
Simulations of the cadaveric bending tests were performed to validate the bending deformation of the fifth metatarsal model (Trabelsi et al., 2014). Similar to the cadaver’s bending test conducted by Trabelsi et al., these simulations constrained the displacement of nodes in the proximal part of the fifth metatarsal finite-element model. After selecting a node at the distal end, a bending load was applied in the vertically upward direction. The proximal and distal strains measured in the cadaver experiment were at SG1 and SG2, respectively, as shown in Figure 4(a). Figure 4(b) shows the strains obtained from the experimental results and simulations at the positions of SG1 and SG2. As because the experiment focused on the first and second metatarsal bones, the results cannot be compared with those of the fifth metatarsal finite-element model. The minimum diameters of the first and second metatarsal bones used in the experiment were 14.2 ± 0.424 mm and 8.76 ± 0.677 mm, respectively. In contrast, the minimum diameter of the fifth metatarsal finite-element model used in the simulation was 10.3 mm. Thus, we assumed that the strain decreases in the order of the second metatarsal bone, the fifth metatarsal bone, and the first metatarsal bone. As shown in Figure 4(b), the strain on the fifth metatarsal finite-element model was larger than that on the second metatarsal bone and smaller than that on the first metatarsal bone, as expected.
Understanding the effects of ball orientation in Rugby Union place kicking: the preferences of international kickers and the kinematics of the foot-ball impact
Published in Sports Biomechanics, 2023
Sam Jones, Hiroyuki Nunome, Simon Augustus, James C. A. Peacock, Kevin Ball, Neil E. Bezodis
Shank and foot segments were reconstructed from the filtered marker data as three-dimensional vectors from the ankle (lateral malleolus) to knee (lateral epicondyle) and heel (lateral aspect of calcaneus) to fifth metatarsal markers, respectively. The azimuth angle for each segment was defined as the angle between a vector in the positive x direction (originating from the segment’s origin) and the segment vector projected in the x-y plane. The elevation angle for each segment was defined as the elevation of the three-dimensional segment vector from the x-y plane (Figure 2). Plantar flexion of the ankle was defined as the angle between the shank and foot segments, calculated using the vector product. An angle of 0° was defined as, when the segment vectors were perpendicular, with a positive value indicating plantar flexion. The change in plantar flexion angle between the start and end of impact was defined as the plantar flexion range of motion during impact.
Effect of consecutive jumping trials on metatarsophalangeal, ankle, and knee biomechanics during take-off and landing
Published in European Journal of Sport Science, 2021
Wing-Kai Lam, Sheng-Wei Jia, Julien S. Baker, Ukadike C. Ugbolue, Yaodong Gu, Wei Sun
Jumping is the key attribute for offensive and defensive plays in basketball. Competitive basketball games require up to 70 jumps per player and include jump shots, rebounds, block shots and lay-ups (Ben Abdelkrim, El Fazaa, & El Ati, 2007; McClay et al., 1994; McInnes, Carlson, Jones, & McKenna, 1995). While rapid and repetitive jumps are often required for rebound and block actions in basketball (Wissel, 2012), these jumps can lead to strenuous loads on the lower extremities during landing. This is regarded as the common risk factor for ankle ligament, anterior cruciate ligament, and fifth metatarsal stress fracture injuries (Cumps, Verhagen, & Meeusen, 2007; McKay, Goldie, Payne, & Oakes, 2001; Siegmund, Huxel, & Swanik, 2008). Information on jump landing characteristics could be useful in predicting lower extremity injuries (van der Does, Brink, Benjaminse, Visscher, & Lemmink, 2016), and jump landing biomechanics during the performance of different jump techniques would provide additional insights into designing training regimes.