Plantar-flexion of the ankle joint complex in terminal stance is initiated by subtalar plantar-flexion: A bi-planar fluoroscopy study

Koo, Seungbum; Lee, Kyoung Min; Joo, Young Hoon

doi:10.1016/j.gaitpost.2015.07.009

Cited by 38 publications

(36 citation statements)

References 28 publications

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“…For the AJC, the distal tibia, talus, and calcaneus were embedded with anatomical coordinate systems (ACS) defined using anatomical landmarks of the bones. 43 For the knee joint, the ACS of the distal femur and proximal tibia were also defined through an automated procedure based on the anatomical features of the bones. 54 All the ACS had the positive x-axis directed anteriorly, the positive y-axis directed superiorly and the positive z-axis directed to the right.…”

Section: B3 Standard Reference Bone Posesmentioning

confidence: 99%

“…Biplane dynamic x ray has been used to address the issue, as the simultaneous incorporation of an additional x‐ray image plane enables a better determination of all six degrees‐of‐freedom (6‐DOF) of individual bones. Such methods have been validated in vitro for their accuracy in measurements of kinematics of various joints, and have also been applied to measure rigid‐body and intra‐articular surface kinematics in various joints during quasistatic and dynamic activities …”

Section: Introductionmentioning

confidence: 99%

“…Such methods have been validated in vitro for their accuracy in measurements of kinematics of various joints, [24][25][26][36][37][38][39] and have also been applied to measure rigid-body and intra-articular surface kinematics in various joints during quasistatic 40,41 and dynamic activities. [42][43][44][45] By definition, biplane dynamic x ray-based methods require synchronized imaging by the two x-ray units, which can be achieved only on custom-built biplane systems or by integrating two single-plane C-arm fluoroscopes. 25,37,39,43,46 This may limit the application of these methods in clinical settings because clinical biplane x-ray image systems normally employ an alternating generation/acquisition scheme (i.e., nonsynchronized) in order to minimize the cross-scatter effects.…”

Section: Introductionmentioning

confidence: 99%

“…[42][43][44][45] By definition, biplane dynamic x ray-based methods require synchronized imaging by the two x-ray units, which can be achieved only on custom-built biplane systems or by integrating two single-plane C-arm fluoroscopes. 25,37,39,43,46 This may limit the application of these methods in clinical settings because clinical biplane x-ray image systems normally employ an alternating generation/acquisition scheme (i.e., nonsynchronized) in order to minimize the cross-scatter effects. The time offset between the two alternating sequential exposures is constant and may be acceptable for measurements of static bone poses or slow joint motions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A model‐based tracking method for measuring 3D dynamic joint motion using an alternating biplane x‐ray imaging system

Lin

et al. 2018

Medical Physics

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A new model-based tracking method based on MCPI has been developed for measuring dynamic joint motions using an alternating biplane x-ray imaging system widely available in medical centers. The MCPI method has been demonstrated in vitro to be highly accurate in determining the 3D kinematics of the bones of both the ankle joint complex and the knee. The current results suggest that the MCPI method would be an effective approach for measuring in vivo 3D kinematics of dynamic joint motion in a clinical setting equipped with an alternating biplane x-ray imaging system.

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Section: B3 Standard Reference Bone Posesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A model‐based tracking method for measuring 3D dynamic joint motion using an alternating biplane x‐ray imaging system

Lin

et al. 2018

Medical Physics

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“…Measuring the secondary motions in the knee with skin markers involves skin artifact [19,20]. Recently, a biplanar fluoroscopic (BPF) system was introduced to measure in vivo skeletal kinematics [21][22][23][24][25]. The BPF system captures in vivo skeletal images and calculates three-dimensional intact kinematics of joints with stateof-the-art accuracy.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Kinematic Coupling of the Healthy Knee During Treadmill Walking

Koo

2019

Journal of Biomechanical Engineering

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Accurate joint kinematics plays an important role in estimating joint kinetics in musculoskeletal simulations. Biplanar fluoroscopic (BPF) systems have been introduced to measure skeletal kinematics with six degrees-of-freedom. The purpose of this study was to model knee kinematic coupling using knee kinematics during walking, as measured by the BPF system. Seven healthy individuals (mean age, 23 ± 2 yr) performed treadmill walking trials at 1.2 m/s. Knee kinematics was regressed separately for the swing and stance phases using a generalized mixed effects model. Tibial anterior translation function was y=0.20x−3.09 for the swing phase and y=0.31x−0.54 for the stance phase, where x was the flexion angle and y was the tibial anterior translation. Tibial lateral and inferior translation were also regressed separately for the stance phase and the swing phase. Tibial external rotation was y=−0.002x2+0.19x−0.64 for the swing phase and y=−0.19x−1.22 for the stance phase. The tibial adduction rotation function was also calculated separately for the stance and swing phase. The study presented three-dimensional coupled motion in the knee during the stance and swing phases of walking, and demonstrated the lateral pivoting motion found in previous studies. This expanded understanding of secondary knee motion functions will benefit musculoskeletal simulation and help improve the accuracy of calculated kinetics.

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Direct visualization and measurement of the plantar aponeurosis behavior in foot arch deformation via the windlass mechanism

Matsumoto,

Ogihara

2024

Clinical Anatomy

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The plantar aponeurosis (PA) is an elastic longitudinal band that contributes to the generation of a propulsive force in the push‐off phase during walking and running through the windlass mechanism. However, the dynamic behavior of the PA remains unclear owing to the lack of direct measurement of the strain it generates. Therefore, this study aimed to visualize and quantify the PA behavior during two distinct foot postures: (i) neutral posture and (ii) windlass posture with midtarsal joint plantarflexion and metatarsophalangeal joint dorsiflexion, using computed tomography scans. Six healthy adult males participated in the experiment, and three‐dimensional reconstruction of the PA was conducted to calculate its path length, width, thickness, and cross‐sectional area. This study successfully visualized and quantified the morphological changes in the PA induced by the windlass mechanism, providing a precise reference for biomechanical modeling. This study also highlighted the interindividual variability in the PA morphology and stretching patterns. Although the windlass posture was not identical to that observed in the push‐off phase during walking, the observed PA behavior provides valuable insights into its mechanics and potential implications for foot disorders.

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Plantar-flexion of the ankle joint complex in terminal stance is initiated by subtalar plantar-flexion: A bi-planar fluoroscopy study

Cited by 38 publications

References 28 publications

A model‐based tracking method for measuring 3D dynamic joint motion using an alternating biplane x‐ray imaging system

A model‐based tracking method for measuring 3D dynamic joint motion using an alternating biplane x‐ray imaging system

Three-Dimensional Kinematic Coupling of the Healthy Knee During Treadmill Walking

Direct visualization and measurement of the plantar aponeurosis behavior in foot arch deformation via the windlass mechanism

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