Cinematica fisica exercicios12/17/2023 A transient lameness model, evoking pressure on the hoof sole, was used to induce 3 degrees of fore- and hindlimb lameness. Using the locomotion analysis system CODA-3, the kinematics of the horses were recorded while walking (1.6 m/s) and trotting (3.5 m/s) on a treadmill. The kinematic patterns of all limbs of 11 clinically nonlame Dutch Warmblood horses were studied during induced supporting limb lameness to gain insight into the compensation mechanisms horses use to manage lameness and to test kinematic limb variables for their significance as lameness indicators. The information gained from this study will be important in developing objective image-based equine lameness diagnostic techniques. Several hoof kinematic variables measured in this study differed between mild hind and fore lamenesses but fewer variables differentiated mild lamenesses from sound conditions. Changes in the motion patterns of all 4 hooves occurred during fore and hind hoof lamenesses, reflecting a redistribution of weightbearing onto the 3 sound limbs. Horses slowed and shortened their strides during lameness treatments without changing stride duration. A split-plot in time model was used in an analysis of covariance, allowing treatment comparisons on an equivalent-velocity basis. Horses were hand led at the trot for 6 trials under each treatment. Videotapes (60 Hz) were taken from a camera aimed perpendicularly to the line of horse motion, with a metrestick taped as a reference distance. Treatments were a sound control condition a mild fore hoof lameness a mild hind hoof lameness and another sound control following either lameness treatment. Into each nut was seated a vertical bolt which could be adjusted to alter pressure upon the hoof sole, producing transitory lamenesses of variable magnitude. Six sound Dutch Warmblood mares were shod with 4 steel shoes to which were welded 2 nuts inside the medial and lateral branches of the 2 right shoes. This study determined differences in hoof motion patterns of the trot between mild fore hoof lameness, mild hind hoof lameness and sound control conditions. Videographic analyses offered details of the alterations in the movement of horses, which are important in the diagnosis of lameness. The lame animals had a longer support time, lifted the non-lame limbs and showed a shorter stride. Only with trotting did the lame animals manifest a prolonged duration of the stance phase for all limbs. The head was shown to be in a more elevated position when the lame limb made first contact with the treadmill belt, which was not observed in the case of the healthy limbs. At walk and at trot, the animals demonstrated two vertical head movements per stride, while after induction of lameness only one head movement was observed per stride, where this movement was of greater amplitude. Markers were placed on the zygomatic process of the temporal bone, spiny process of the sixth thoracic and first lumbar vertebrae and on the proximal phalange. Lameness was induced in the left forelimb utilizing a transient lameness model. Six Purebred Arabian colts were filmed on a treadmill, at walk and at trot, before and after induction of lameness. Video cameras (60 Hz) and computational methods were used. The objective was to record the alterations in the movement of the head and limbs of horses in a lame and non-lame condition. Videographic analyses allow the qualitative and quantitative investigation of the movement, reducing the subjectivity of evaluations. Lameness manifests itself during the movement of the animal or at rest, indicating a structural or functional disturbance in one or more limbs.
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