1 This study presented a model-based image-matching (MBIM) motion analysis 2 technique for ankle joint kinematic measurement. Five cadaveric below-hip 3 specimens were manipulated through a full range of ankle joint motions in bare-foot 4 and shoed conditions. The ankle motions were analyzed by bone-pin marker-based 5 motion analysis and MBIM motion analysis techniques respectively. The root me...

Background. High energy fractures of the distal tibia ("pylon fractures") usually result in severe reduction of the range of motion of the superior ankle joint. If there is severe soft tissue trauma coexisting with the fractures, the possibilities for surgical treatment are limited. Our study examined the suitability of the DYNASTAB S external fixator (for ankle joint stabilization). Material a...

[Purpose] The purpose of this study was to investigate the change in soleus extensibility from a joint contracture caused by a reduction in joint movement with unweighted lower limbs and to interpret the results to aid in the treatment of human joint contractures. [Subjects and Methods] The subjects of this study were twenty-one 10-weeks-old male Wistar rats. Twenty-one rats were divided into o...

Fibular Hemimelia is the most common lower extremity congenital longitudinal deficiency (frequency 1/40,000 live births). . It is associated with a constellation of deformities including foot ray deficiencies, subtalar coalition, ball and socket ankle joint, ankle joint malorientation, diaphyseal angular deformity apex anteromedial, fibular deficiency. . Congenital shortening of the tibia assoc...

In this paper standing balance control of a biped with toe-joint is presented. The model consists of an inverted pendulum as the upper body and the foot contains toe-joint. The biped is actuated by two torques at ankle-joint and toe-joint to regulate the upper body in upright position. To model the interaction between foot and the ground, configuration constraints are defined and utilized. To s...

[Purpose] The purpose of this study was to determine the activities of the muscles around the ankle joint during foot gripping. [Subjects] The subjects of this study were 17 healthy females. [Methods] We measured the maximum voluntary contraction (MVC) activities of the soleus muscle, the medial head of the gastrocnemius muscle, and the tibialis anterior muscle, and calculated %IEMG during foot...

Low-levelfinite state (locked-unl&e~ control is compared with open-loop stimulation of the knee extensor muscles in functional eleGtriia1 stimulation (FES) induced paraplegic standing. i%e parameters were: duration of standing, relative torque loss in knee extensor mus&s, knee angle stability, average stimulus output and average arm effort during standing. To investigate thz impact of external ...

Healthy humans maintained equilibrium on rocking supports (seesaw) of different curvatures and heights. We recorded platform tilt, horizontal displacements of the upper body, ankle joint angle and activity of ankle joint muscles. Subjects maintained balance by making seesaw rotations placing the support under the body's centre-of-gravity. Forward displacement was balanced by compensatory planta...

OBJECTIVE Claudication is the most common manifestation of peripheral arterial disease (PAD) producing significant ambulatory compromise. The purpose of this study was to use advanced biomechanical analysis to characterize the kinematic ambulatory pattern of claudicating patients. We hypothesized that compared with control subjects, claudicating patients have altered kinematic gait patterns tha...

Total ankle arthroplasty was developed to reduce pain and retain motion of the ankle joint in patients with osteoarthritis much like its total hip and knee counterparts. Orthopaedic surgeons are well equipped to evaluate and treat patients with end-stage hip or knee arthritis; however, the management of patients with ankle arthritis represents a challenge to both general orthopaedic surgeons an...