Ground-dwelling birds are typically characterized as erect bipeds having hind limbs that operate parasagittally. Consequently, most previous research has emphasized flexion/extension angles and moments as calculated from a lateral perspective. Three-dimensional (3D) motion analyses have documented non-planar limb movements, but the skeletal kinematics underlying changes in foot orientation and ...

Two telemeterized femoral components were implanted in two patients as part of normal total hip replacement procedures. The two components were instrumented to measure the three force components directed along: (a) the neck axis, (b) transverse to the neck axis and in the plane of the prosthesis, and (c) transverse to the neck axis and perpendicular to the plane of the prosthesis. Data were col...

Mechanical factors have a strong influence on the growth and development of the skeleton [1], [2]. Forces acting on the growing bones play an important role in their forming process. Disturbances of such loadings in the prenatal period as well as during infancy and childhood can lead to serious developmental deformities [3]. Proximal end of the femur is one of the main parts of the hip joint. T...

BACKGROUND AND PURPOSE The alpha angle is the most used measurement to classify concavity of the femoral head-neck junction. It is not only used for treatment decisions for hip impingement, but also in cohort studies relating hip morphology and osteoarthritis. Alpha angle measurement requires identification of the femoral neck axis, the definition of which may vary between studies. The original...

case report: we report a 44-year-old man with right femoral nerve palsy following delayed reduction of an anterior dislocation of hip. conclusion: two months after closed reduction, complete clinical recovery of right femoral nerve was achieved and the patient was able to resume his job. introduction: incidence of nerve injury in traumatic hip dislocations is up to 10 %. sciatic nerve is the mo...

habitual dislocation of the hip (hdh) in children is a rare entity and can be a causative factor for popping or snapping hip which is a common problem in children with good prognosis. we report a case of hdh in a 9 year old girl who was suffering from frequent snapping hip at night, its course and treatment process.

The authors have focused on the bipedal humanoid robot expected to play an active role in human living space, through studies on an anthropomorphic biped walking robot. As the first stage of developing a bipedal humanoid robot, the authors developed the human-size 35 active DOF bipedal humanoid robot “WABIAN” and the human-size 41 active DOF bipedal humanoid robot “ WABIAN-R”. The authors also ...

developmental dysplasia of the hip (ddh) or congenital hip dysplasia (cdh) is the most prevalent developmental childhood hip disorder. it includes a wide spectrum of hip abnormalities ranging from dysplasia to subluxation and complete dislocation of the hip joint. the natural history of neglected ddh in adults is highly variable. the mean age of onset of symptoms is 34.5 years for dysplastic dd...

hip fracture, the most dramatic complication of osteoporosis, constitutes a serious health problem of the elderly, with great socioeconomic consequences. hip fracture epidemiology has been studied by many investigators. until now, there are no reported studies in iran regarding this issue. we studied hip fractures that occurred in iran in 2003 and compared the findings with those of other count...

INTRODUCTION Several clinical applications rely on the accurate estimation and description of the proximal aspect of the femur in order to obtain satisfactory results. The femoral neck axis is usually defined as a straight line connected between the femoral head center and the mean point of middle part of the neck. These two anatomical landmarks (ALs) are not directly accessible by palpation. T...