In this study, we proposed a new approach for determining the dynamic knee joint range of motion according to the external load applied during leg extension exercise. One elderly participant volunteered. The dynamometer task was performed to develop a subject-specific model using maximum voluntary contractions. EMG signals were also measured simultaneously. After the dynamometer task, 3D motion data were captured during leg extension exercise. The data obtained from the dynamometer task were used to develop the subject-specific model using an EMG-driven model, and then the developed model was used to estimate joint moment during leg extension exercise. Adjusting the model parameters positively affected the correlation and RMS error. The correlation between the model prediction and the measured joint moment increased with decreasing RMS error. The predicted knee joint moments during the leg extension exercise showed the usual inverse parabolic shapes in terms of time. These results implied that the dynamic range of motion should vary according to the external load applied to the joint. In this paper, we proposed a novel method to determine the dynamic knee joint range of motion using an EMG-driven model. We expect that the proposed approach will be employed to design exercise/rehabilitation protocols for the elderly.
Approximately 60% of stroke survivors experience hand dysfunction limiting execution of daily activities. Several methods have been proposed to objectively quantify fingers' joints range of motion (ROM), while few studies exist about multi-finger coordination during hand movements. The present wo...
This study evaluates a new method for intraoperative determination of femoral component rotation by a navigation system (flexion axis, FA) driven by joint stability over the range of motion. Seventy-five patients were treated with a navigated total knee replacement. Intraoperatively, the posterio...
Measuring the motion of the scapula and humerus with sub-millimeter levels of accuracy in six-degrees-of-freedom (6-DOF) is a challenging problem. The current methods to measure shoulder joint motion via the skin do not produce clinically significant levels of accuracy. Thus, the purpose of this ...
submitted by amitgoyal1972 1 year and 3 months ago
The non-pharmacological treatment of osteoarthritis (OA) includes exercise therapy; however, little is known about the specific effect of exercise on the joint per se. The purpose of the present study was to investigate the direct effects of a load-bearing exercise upon cartilage in a single, hum...
In this paper, a study leading towards a new definition of a ship–ship collision criterion, allowing further estimation of the probability of maritime accidents is conducted. The criterion is called the minimum distance to collision (MDTC) and reflects the shortest distance between two ships at...
Knee joint forces measured from instrumented implants provide important information for testing the validity of computational models that predict knee joint forces. The purpose of this study was to validate a parametric numerical model for predicting knee joint contact forces against measurements...
A new dynamic one-equation subgrid-scale (SGS) model is presented for large eddy simulations of turbulent flows. The new model, combining both advantages of the dynamic one-equation SGS model (J. Appl. Mech. (ASME) 2006; 73:368-373) and the wall-adapting local eddy viscosity model (Turbulence Com...
The combination of three-dimensional (3-D) models with dual fluoroscopy is increasingly popular for evaluating joint function in vivo. Applying these modalities to study knee motion with high accuracy requires reliable anatomical coordinate systems (ACSs) for the femur and tibia. Therefore, a rob...
submitted by chlailiphosmi 2 years and 2 months ago
The determination of rehabilitation effectiveness in children with cerebral palsy (CP) depends on the metric properties of the outcome measure. We evaluated the reliability of kinematic measures of functional upper limb reaching movements in children with CP.Method Thirteen children (ten females,...
Thermodynamics-based dynamic programming RNA secondary structure algorithms have been of immense importance in molecular biology, where applications range from the detection of novel selenoproteins using expressed sequence tag (EST) data, to the determination of microRNA genes and their targets. ...
