The Reproducibility of Passive Human Knee-Joint Motion Characteristics

1985 ◽  
pp. 309-314 ◽  
Author(s):  
L. Blankevoort ◽  
R. Huiskes ◽  
A. de Lange
Keyword(s):  
Knee Joint ◽  
Joint Motion ◽  
Human Knee ◽  
Human Knee Joint ◽  
Knee Joint Motion ◽  
Motion Characteristics

The reproducibility of passive human knee-joint motion characteristics

1985 ◽  
Vol 18 (7) ◽  
pp. 529-530
Author(s):  
L. Blankevoort ◽  
R. Huiskes ◽  
A. de Lange
Keyword(s):  
Knee Joint ◽  
Joint Motion ◽  
Human Knee ◽  
Human Knee Joint ◽  
Knee Joint Motion ◽  
Motion Characteristics

Accuracy of an electromagnetic measurement device and application to the measurement and description of knee joint motion

1998 ◽  
Vol 212 (5) ◽  
pp. 347-355 ◽  
Author(s):  
A M J Bull ◽  
F H Berkshire ◽  
A A Amis
Keyword(s):  
Knee Joint ◽  
Positional Error ◽  
Joint Motion ◽  
Step Size ◽  
Measurement Device ◽  
Human Knee ◽  
Multiple Receivers ◽  
Human Knee Joint ◽  
Knee Joint Motion ◽  
Electromagnetic Measurement

The aims of this study were to analyse the accuracy and sensitivity to metals of an electromagnetic motion measurement device and to use it to provide a description of motion of the human knee joint. A calibrated grid and sine bar were used to measure translational and rotational accuracy, which were found to be ±0.23 per cent of the step size (translation) and ±2.0 per cent of the step size (rotation) within an optimal operational zone of minimal positional error for which the receiver to transmitter separation was between 271 and 723 mm. The presence of multiple receivers was found to have a significant effect on the accuracy only when positioned within 30 mm of one another. Mild steel was found to have a significant detrimental effect when within 150 mm of the transmitter or receiver. A stainless steel bone screw had no effect on the accuracy of the device. A mathematical description of knee joint motion is presented which describes the motion in terms of clinical rotations. The device is a useful tool for measuring joint motion in the operating theatre and laboratory, owing to its accuracy and insensitivity to surgical alloys.

scholarly journals Modelling of the Human Knee Joint Supported by Active Orthosis

2018 ◽  
Vol 23 (1) ◽  
pp. 107-120
Author(s):  
V. Musalimov ◽  
Y. Monahov ◽  
M. Tamre ◽  
D. Rõbak ◽  
A. Sivitski ◽  
...  
Keyword(s):  
Knee Joint ◽  
Sagittal Plane ◽  
Low Cost ◽  
Lower Limbs ◽  
Human Knee ◽  
Human Knee Joint ◽  
Healthy Knee ◽  
Knee Joint Motion ◽  
Injured Knee ◽  
Active Orthosis

AbstractThe article discusses motion of a healthy knee joint in the sagittal plane and motion of an injured knee joint supported by an active orthosis. A kinematic scheme of a mechanism for the simulation of a knee joint motion is developed and motion of healthy and injured knee joints are modelled in Matlab. Angles between links, which simulate the femur and tibia are controlled by Simulink block of Model predictive control (MPC). The results of simulation have been compared with several samples of real motion of the human knee joint obtained from motion capture systems. On the basis of these analyses and also of the analysis of the forces in human lower limbs created at motion, an active smart orthosis is developed. The orthosis design was optimized to achieve an energy saving system with sufficient anatomy, necessary reliability, easy exploitation and low cost. With the orthosis it is possible to unload the knee joint, and also partially or fully compensate muscle forces required for the bending of the lower limb.

Cadaveric Evaluation of Soft-Tissue Constraint in the Human Knee

2013 ◽  
Author(s):  
Adam Cyr ◽  
Lorin Maletsky
Keyword(s):  
Soft Tissue ◽  
Knee Joint ◽  
Joint Kinematics ◽  
Motion Patterns ◽  
Passive Motion ◽  
Human Knee ◽  
Human Knee Joint ◽  
Knee Joint Kinematics ◽  
Motion Characteristics

The motion patterns of the human knee joint depend on its passive motion characteristics, which are described by the ligamentous and articular constraints. Since active motions, like walking and squatting are believe to fall within a passive envelope, the basis for the understanding of the knee joint kinematics lies in the description of its passive characteristics.

Evaluating Relationship Between Passive Knee Envelope and a Dynamically Simulated Walk

2010 ◽  
Author(s):  
Amit M. Mane ◽  
Lorin P. Maletsky
Keyword(s):  
Knee Joint ◽  
Principal Component ◽  
Motion Patterns ◽  
Human Knee ◽  
Human Knee Joint ◽  
Analysis Technique ◽  
Knee Joint Kinematics ◽  
Motion Characteristics ◽  
Muscle Activations ◽  
Tibiofemoral Kinematics

The motion patterns of the human knee joint depend on its passive motion characteristics, which are described by the ligamentious and articular constraints. Since active motions, like walking and squatting are believed to fall within a passive envelope, the basis for the understanding of the knee joint kinematics lies in the description of its passive constraint characteristics [1]. The link between the knee passive envelope and the kinematics during various dynamic activities has not been studied. It is unclear how the articular geometry and muscle activations of the knee influence the contribution of ligament constraints during dynamic activities. To explain the relationship between knee passive envelope and dynamic activities completely, new methodology must be developed. The objective of the present study was to estimate the effects of variation in passive knee envelope on the tibiofemoral kinematics during dynamically simulated gait using a multivariate analysis technique, principal component (PC) analysis.

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