Clinical biomechanics
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Clinical biomechanics · Mar 2000
Contribution of the extrinsic and intrinsic hand muscles to the moments in finger joints.
The purpose of this current work is to develop a method of estimating force produced by the extrinsic and intrinsic hand muscles, and to estimate the contribution of these muscles to the finger joint moments. ⋯ This study suggests ways of identifying the source of functional deficiency in the hand.
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Clinical biomechanics · Mar 2000
Comparative StudyInterference screw fixation of doubled flexor tendon graft in anterior cruciate ligament reconstruction - biomechanical evaluation with cyclic elongation.
To biomechanically evaluate interference screw fixation of the doubled flexor tendon graft in anterior cruciate ligament reconstruction using cyclic elongation. ⋯ The present study has suggested that vigorous activities should not be permitted for the patients in the early period after anterior cruciate ligament reconstruction using this fixation technique, because of its low ultimate failure load.
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Clinical biomechanics · Mar 2000
In vivo kinematic study of normal wrist motion: an ultrafast computed tomographic study.
To quantify in vivo carpal kinematics of a normal wrist in a dynamic continuous model. ⋯ In this study, we demonstrated the suitability of using two-dimensional computed tomographic images in a quantitative study of flexion/extension kinematics of the normal wrist.
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Clinical biomechanics · Mar 2000
Biexponential recovery model of lumbar viscoelastic laxity and reflexive muscular activity after prolonged cyclic loading.
To determine the rest duration required for full recovery of reflexive muscular activity and laxity/creep induced in the lumbar viscoelastic structures (e.g., ligaments, discs, etc.) after 50 min of cyclic loading, and to develop a model describing such recovery. ⋯ Although the data was derived from a feline model, and its extrapolation to the human model is not straightforward, the general pattern of decreasing reflexive muscular activity with cyclic loading is expected in both species. Therefore, workers who subject their spine to periods of cyclic loading may be exposed to prolonged periods of laxity beyond the neutral zone limits, without protection from the muscles and therefore the risk of possible injury and low back pain. Pain and muscle hyperexcitability could also be a factor associated with cyclic loading, being expressed several hours after work was completed.