Human Knee Inverse Dynamics Model of Vertical Jump Exercise

2019 ◽  
Vol 14 (10) ◽  
Author(s):  
Dumitru I. Caruntu ◽  
Ricardo Moreno
Keyword(s):  
Inverse Dynamics ◽  
Sagittal Plane ◽  
Vertical Jump ◽  
Contact Forces ◽  
Collateral Ligaments ◽  
Dynamics Model ◽  
Human Knee ◽  
Jump Exercise ◽  
Joint Forces ◽  
Patella Ligament

Abstract This work deals with the dynamics of the human knee during vertical jump exercise. The focus is on the joint forces necessary to produce the jump and to dissipate energy during landing. A two-dimensional (2D) sagittal plane, inverse dynamics human leg model is developed. This model uses data from a motion capture system and force plates in order to predict knee and hip joint forces during the vertical jump exercise. The model consists of three bony structures femur, tibia, and patella, ligament structures to include both cruciate and collateral ligaments, and knee joint muscles. The inverse dynamics model is solved using optimization in order to predict joint forces during this exercise. matlab software package is used for the optimization computations. Results are compared with data available in the literature. This work provides insight regarding contact forces and ligaments forces, muscle forces, and knee and hip contact forces in the vertical jump exercise.

A Model of Human Knee Ligaments in the Sagittal Plane: Part 2: Fibre Recruitment under Load

1992 ◽  
Vol 206 (3) ◽  
pp. 135-145 ◽  
Author(s):  
A B Zavatsky ◽  
J J O'Connor
Keyword(s):  
Sagittal Plane ◽  
Geometric Analysis ◽  
Collateral Ligaments ◽  
Compatibility Conditions ◽  
Knee Ligaments ◽  
Human Knee ◽  
Flexion Extension ◽  
Passive Flexion ◽  
Tibial Translation ◽  
Anterior Posterior

A mathematical model of the knee ligaments in the sagittal plane is used to study the forces in the cruciate and collateral ligaments produced by anterior/posterior tibial translation. The model is based on ligament fibre functional architecture. Geometric analysis of the deformed configurations of the model ligaments provides the additional compatibility conditions necessary for calculation of the statically indeterminate distributions of strain and stress within the ligaments and the sharing of load between ligaments. The investigation quantifies the process of ligament fibre recruitment, which occurs when fibres made slack by passive flexion/extension of the knee stretch and change their spatial positions in order to resist applied loads. The calculated ligament forces are in reasonable agreement with experimental results reported in the literature. The model explains some subtleties of ligament function not incorporated in models that represent the ligaments by a small number of lines.

Minimal Kinematic Model for Inverse Dynamic Analysis of Gait

2014 ◽  
Author(s):  
D. S. Mohan Varma ◽  
S. Sujatha
Keyword(s):  
Inverse Dynamics ◽  
Sagittal Plane ◽  
Center Of Mass ◽  
Reaction Force ◽  
Kinematic Model ◽  
Parameter Estimates ◽  
Dynamics Model ◽  
Kinematic Data ◽  
Segment Model ◽  
Internal Joint

The objective of this work is to develop an inverse dynamics model that uses minimal kinematic inputs to estimate the ground reaction force (GRF). The human body is modeled with 14 rigid segments and a circular ankle-foot-roll-over shape (AFROS) for the foot-ground interaction. The input kinematic data and body segment parameter estimates are obtained from literature. Optimization is used to ensure that the kinematic data satisfy the constraint that the swing leg clears the ground in the single support (SS) phase. For the SS phase, using the segment angles as the generalized degrees of freedom (DOF), the kinematic component of the GRF is expressed analytically as the summation of weighted kinematics of individual segments. The weighting functions are constants that are functions of the segment masses and center of mass distances. Using this form of the equation for GRF, it is seen that the kinematics of the upper body segments do not contribute to the vertical component GRFy in SS phase enabling the reduction of a 16-DOF 14-segment model to a 10-DOF 7-segment model. It is seen that the model can be further reduced to a 3-DOF model for GRFy estimation in the SS phase of gait. The horizontal component GRFx is computed assuming that the net GRF vector passes through the center of mass (CoM). The GRF in double support phase is assumed to change linearly from one foot to the other. The sagittal plane internal joint forces and moments acting at the ankle, knee and hip are computed using the 3-DOF model and the 10-DOF model and compared with the results from literature. An AFROS and measurements of the stance shank and thigh rotations in the sagittal plane, and of the lower trunk (or pelvis) in the frontal plane provide sufficient kinematics in an inverse dynamics model to estimate the GRF and joint reaction forces and moments. Such a model has the potential to simplify gait analysis.

On Squat Jump Exercise

2016 ◽  
Author(s):  
Dumitru I. Caruntu ◽  
Ricardo Moreno
Keyword(s):  
Dynamic Model ◽  
Inverse Dynamics ◽  
Sagittal Plane ◽  
Contact Point ◽  
Point Location ◽  
Squat Jump ◽  
Jump Exercise ◽  
Joint Contact ◽  
Good Agreement

This paper deals with the mechanics of the human leg and forces in the muscles, ligaments, and joint contact in the leg during a squat jump exercise. An inverse dynamics approach is used in this work. A 2-D dynamic model of one limb in the sagittal plane is used to investigate this ballistic task. Results are then compared to data available in the literature. They show good agreement. The response of the ligament forces and the tibio-femoral contact point location during the exercise are reported.

Human Knee Joint Inverse Dynamics Model for Walking and Moderate Squat Exercise

2015 ◽  
Author(s):  
Dumitru I. Caruntu ◽  
Ricardo Gomez
Keyword(s):  
Knee Joint ◽  
Stance Phase ◽  
Gait Cycle ◽  
Inverse Dynamics ◽  
Two Dimensional ◽  
Dynamics Model ◽  
Hip Joints ◽  
Human Knee ◽  
Human Knee Joint ◽  
Squat Exercise

This paper deals with human knee and hip joints’ forces in moderate squatting motion. The model developed for squatting is validated through simulations for walking (the stance phase of gait cycle) which are compared with data available in the literature. The knee model is two dimensional and includes tibia, femur, ligamentous knee structures, and muscles. The model is used to investigate the ligament, contact and muscle forces during both moderate squatting and walking.

Functional Evaluation of a Personalized Orthosis for Knee Osteoarthritis - A Motion Capture Analysis

2021 ◽  
Author(s):  
Martin Huber ◽  
Matthew Eschbach ◽  
Kazem Kazerounian ◽  
Horea T. Ilies
Keyword(s):  
Knee Joint ◽  
Knee Osteoarthritis ◽  
Motion Capture ◽  
Inverse Dynamics ◽  
Statistical Significance ◽  
Knee Kinematics ◽  
Contact Forces ◽  
Patient Specific ◽  
Functional Evaluation ◽  
Shock Absorption

Abstract Knee osteoarthritis (OA) is a disease that compromises the cartilage inside the knee joint, resulting in pain and impaired mobility. Bracing is a common treatment, however currently prescribed braces cannot treat bicompartmental knee OA, fail to consider the muscle weakness that typically accompanies the disease, and utilize hinges that restrict the knee's natural biomechanics. We have developed and evaluated a brace which addresses these shortcomings. This process has respected three principal design goals: reducing the load experienced across the entire knee joint, generating a supportive moment to aid the muscles in shock absorption, and interfering minimally with gait kinematics. Load reduction is achieved via the compression of medial and lateral leaf springs, and magnetorheological dampers provide the supportive moment during knee loading. A novel, personalized joint mechanism replaces a traditional hinge to reduce interference with knee kinematics. Using motion capture gait analysis, we evaluated the basic functionality of a prototype device. We calculated, via inverse dynamics analysis, the reaction forces at the knee joint and the moments generated by the leg muscles during gait. Comparing these values between braced and unbraced trials allowed us to evaluate the system's effectiveness. Kinematic measurements showed the extent to which the brace interfered with natural gait characteristics. Of the three design goals: a reduction in knee contact forces was demonstrated; increased shock absorption was observed, but not to statistical significance; and natural gait was largely preserved. The techniques presented in this paper could lead to improved OA treatment through patient-specific braces.

Effects of Body Weight Modification on Internal Knee Contact Forces During Gait

2013 ◽  
Author(s):  
Allison L. Kinney ◽  
Heather K. Vincent ◽  
Melinda K. Harman ◽  
James Coburn ◽  
Darryl D. D’Lima ◽  
...  
Keyword(s):  
Body Weight ◽  
Risk Factor ◽  
Knee Joint ◽  
Inverse Dynamics ◽  
Contact Forces ◽  
Weight Changes ◽  
Body Weight Changes ◽  
Total Knee ◽  
Knee Joint Loading ◽  
Knee Load

Obesity is commonly considered a risk factor for the development of knee osteoarthritis [1]. Previous studies have shown that reductions in body weight correspond to reductions in total knee joint compressive forces (as calculated by inverse dynamics) [2–4]. A recent study showed that external knee load measurements are not strong predictors of internal knee contact forces [5]. Therefore, direct measurement of knee contact force is important for understanding how body weight changes impact knee joint loading. Force-measuring knee implants can directly measure internal knee contact forces [6].

scholarly journals Design and Characterization of a Novel Knee Articulation Mechanism

2016 ◽  
Vol 21 (3) ◽  
pp. 611-622 ◽  
Author(s):  
M. Olinski ◽  
A. Gronowicz ◽  
A. Handke ◽  
M. Ceccarelli
Keyword(s):  
Sagittal Plane ◽  
Preliminary Design ◽  
Human Knee ◽  
Knee Rehabilitation ◽  
Flexion Extension ◽  
Adjustable Mechanism ◽  
Centre Of Rotation ◽  
Three Degree Of Freedom ◽  
Supporting Device

Abstract The paper is focused on designing a novel controllable and adjustable mechanism for reproducing human knee joint’s complex motion by taking into account the flexion/extension movement in the sagittal plane, in combination with roll and slide. Main requirements for a knee rehabilitation supporting device are specified by researching the knee’s anatomy and already existing mechanisms. A three degree of freedom (3 DOF) system (four-bar like linkage with controlled variable lengths of rockers) is synthesised to perform the reference path of instantaneous centre of rotation (ICR). Finally, a preliminary design of the adaptive mechanism is elaborated and a numerical model is built in Adams. Numerical results are derived from simulations that are presented to evaluate the accuracy of the reproduced movement and the mechanism’s capabilities.

scholarly journals Relevance of the hyperelastic behavior of cruciate ligaments in the modeling of the human knee joint in sagittal plane

2015 ◽  
Author(s):  
Daniel Alejandro Ponce-Saldias ◽  
◽  
Daniel Martins ◽  
Carlos Rodrigo de Mello-Roesler ◽  
Otavio Teixeira-Pinto ◽  
...  
Keyword(s):  
Knee Joint ◽  
Sagittal Plane ◽  
Cruciate Ligaments ◽  
Human Knee ◽  
Human Knee Joint

Estimation of Muscle Forces About the Ankle During Gait in Healthy and Neurologically Impaired Subjects

2011 ◽  
pp. 320-347
Author(s):  
Daniel N. Bassett ◽  
Joseph D. Gardinier ◽  
Kurt T. Manal ◽  
Thomas S. Buchanan
Keyword(s):  
Muscle Activation ◽  
Inverse Dynamics ◽  
Biomechanical Model ◽  
Forward Dynamics ◽  
Muscle Forces ◽  
Dynamics Model ◽  
Joint Moments ◽  
Neurologically Impaired ◽  
Model Predictions ◽  
Contraction Dynamics

This chapter describes a biomechanical model of the forces about the ankle joint applicable to both unimpaired and neurologically impaired subjects. EMGs and joint kinematics are used as inputs and muscle forces are the outputs. A hybrid modeling approach that uses both forward and inverse dynamics is employed and physiological parameters for the model are tuned for each subject using optimization procedures. The forward dynamics part of the model takes muscle activation and uses Hill-type models of muscle contraction dynamics to estimate muscle forces and the corresponding joint moments. Inverse dynamics is used to calibrate the forward dynamics model predictions of joint moments. In this chapter we will describe how to implement an EMG-driven hybrid forward and inverse dynamics model of the ankle that can be used in healthy and neurologically impaired people.

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