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Dynamic joint stiffness defines the dynamic relationship between the position of the joint and the torque acting about it. Joint stiffness consists of two components: intrinsic and reflex stiffness. Previous work from our lab has shown that subjects can alter their reflex stiffness voluntarily and independently of intrinsic stiffness. Numerous studies have investigated whether reflex stiffness is...
Using an interactive, 3D, kinematic simulation of the human skeleton, the motion of the sacro-iliac (SI) joint is modeled based upon descriptions available in the literature. The major ligaments are added to the simulation data structure using deformable cubic B-spline curve paths. Ligament strains were generated and studied in response to the motion simulations. Results improve our understanding...
There are many patellofemoral prostheses designs available for patellofemoral resurfacing, but few studies provide results objectively comparing these designs. In this study two designs are compared on the basis of patella kinematics and patellofemoral kinetics by means of a computational technique. Results indicated that the patellae displaced laterally after trochlear engagement, while tilt patterns...
Human gait has been proven to be of importance when trying to recognize people. In addition gait also conveys the emotional state of someone. The present study propose to objectively and systematically analyze gait data to highlight features that can characterize someone and the emotion conveyed. Rather than using gait stance phase, frequency, footstep length... we use the inverse kinematics data...
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