OBJECTIVES Preclinical studies using large animal models play an intergral part in translational research. For this study, our objectives were: to develop and validate arthroscopic approaches to four compartments of the stifle joint as determined via the gross and arthroscopic anatomy of the cranial and caudal aspects of the joint. METHODS Cadaveric hindlimbs (n = 39) were harvested from matu...

The three-dimensional anatomy of the ostrich (Struthio camelus) knee (femorotibial, femorofibular, and femoropatellar) joint has scarcely been studied, and could elucidate certain mechanobiological properties of sesamoid bones. The adult ostrich is unique in that it has double patellae, while another similar ratite bird, the emu, has none. Understanding why these patellae form and what purpose ...

Besides enhancing the realism of the animation of virtual humans, the simulation of joints has become an important tool to help medical diagnosis and estimation of post-procedures results, thus simplifying and improving surgery planning. However, to be effective both in diagnosis and treatment planning, one needs to model the joints being analyzed according to the patient characteristics. This ...

Dorsoplantar motion in the upper ankle joint is around one "transverse" rotational axis. In relation to the lower leg this axis is oblique joining the tips of the malleoli. Talocrural motion is highly precise compared to other human joints. Most of the stability and undisturbed motion in the loaded joint is afforded by the intimate osteocartilagineous contact. The rule of the collateral ligamen...

However, in human body animation, joint models are often poor simplifications of real joints. They are usually based on classical works in Robotics, where joints are rather idealized and not conceived to deal with many important biological issues. It is not crucial for Animation because the details of joint motion have little influence on global motion, and other animation techniques are able t...

Talocrural joint injuries are among the most common injuries of the joints and therefore there is a need for a holistic approach to analysis of morphology, biomechanics and visualization of the talocrural joint ligamentary apparatus in different positions. The research was carried out on 20 fresh and conserved anatomical specimens of the lower leg on which X-ray, computed tomography, ultrasonog...

Jaw movement is analyzed as an action between two rigid components jointed together in a particular way, the movable mandible against the stabilized cranium. Opening and closing movements are symmetrical; that is, both sides of the cranio-mandibular articulation are making the same movements. Protrusive and retrusive movements may also be symmetrical. The mandibular muscles determine all the co...

This paper describes a new joint model for articulated human skeletons. The model is based in human anatomy and was conceived for use in medical applications. In this model, we try to overcome some limitations of other models used in computer graphics. To validate, we compared a knee modeled with our approach with a simulator, a plastic model of a knee, and images taken during a video-arthroscopy.